Large Numbers

 Million (1) ,   Billion (2) , Trillion (3) ,  Quadrillion (4) ,  Quintillion (5) ,  Sextillion (6) , Septillion(7) , Octillion (8) ,  Nonillion (9) , Decillion (10)
Prefixes: Un = 1 Duo = 2 Tre = 3 Quattuor = 4 Quin = 5 Sex = 6 Septen = 7 Octo = 8 Novem = 9
Ex: Undecillion (1 + 10) = 11   Sexvigintillion = (6 + 20) = 26
Vigintillion (20) Trigintillion (3o) Quadragintillion (40) Quinquagintillion (50) Sexagintillion (60)
Septuagintillion (70) Octogintillion (80) Nonagintillion (90) Centillion (100)
Prefixes: (100) Cen, (200) Ducen, (300) Trecen, (400) Quadringent, (500) Quingent,  (600) Sescent, (700) Septingent, (800) Octingent,  (900) Nongent
Ex: Nongentbillion (900 + 2) = 902 Octingentquinquinquagintillion (800 + 5 + 50) = 855
Also stand alone as themselves on there specific number (Put tillion after the prefix)
Ex: Ducentillion (200) Quadringentillion (400) Octingentillion (800)
Prefixes: Mill (1000)
Ex: Milloctingentquinquinquagintillion  (1000 + 800 + 5 + 50) = 1855
Also can stand alone (Add illion)
Ex: Millillion (1000)


---Things BEYOND this realm are not offical, but I guess you could say people can still understand you. Use previous prefixes on millillion.
Quattuorquinquaginmillillion. Figure out what that means. Pretty easy. Just do something like that. Later numbers should look like this
Millmillmillmillmillillion (1,000,000,000,000,000) ---



List of numbers recapped in order
Million, Billion, Trillion, Quadrillion, Quintillion, Sextillion, Septillion, Octillion, Nonillion, Decillion, Undecillon, Duodecillion, Tredecillion, Quattuordecillion, Quindecillion, Sexdecillion, Septendecillion, Octodecillion, Novemdecillion, Vigintillion, Unvigintillion, Duovigintillion, Trevigintillion,Quattuorvigintillion, Quinvigintillion, Sexvigintillion, Septemvigintillion, Octovigintillion, Novemvigintillion, Trigintillion, Untrigintillion, Duotrigintillion,Tretrigintillion, Quattuortrigintillion, Quintrigintillion, Sextrigintillion, Septentrigintillion, Octotrigintillion, Novemtrigintillion, Quadragintillion,Unquadragintillion, Duoquadragintillion, Trequadragintillion, Quattuorquadragintillion, Quinquadragintillion, Sexquadragintillion, Septenquadragintillion, Octoquadragintillion, Novemquadragintillion, Quinquagintillion, Unquinquagintillion, Duoquinquagintillion, Trequinquagintillion, Quattuorquinquagintillion, Quinquinquagintillion, Sexquinquagintillion, Septenquinquagintillion, Octoquinquagintillion, Novemquinquagintillion, Sexagintillion, Unsexagintillion, Duosexagintillion, Tresexagintillion, Quattuorsexagintillion, Quinsexagintillion, Sexsexagintillion, Septensexagintillion, Octosexagintillion, Novemsexagintillion, Septuagintillion, Unseptuagintillion, Duoseptuagintillion, Treseptuagtillion, Quattuorseptuagintillion, Quinseptuagintillion, Sexseptuagintillion, Septenseptuagintillion, Octoseptuagintillion, Novemseptuagintillion, Octogintillion, Unoctogintillion, Duooctogintillion, Treoctogintillion, Quattuoroctogintillion, Quinoctogintillion, Sexoctogintillion, Septenoctogintillion, Octooctogintillion, Novemoctogintillion, Nonagintillion, Unnonagintillion, Duononagintillion, Trenonagintillion, Quattuornonagintillion, Quinnonagintillion, Sexnonagintillion, Septennonagintillion, Octononagintillion, Novemnonagintillion, Centillion, Cenmillion, Cenbillion, Centrillion, Cenquadrillion, Cenquintillion, Censextillion, Censeptillion, Cenoctillion, Cennonillion, Cendecillion, Cenundecillon, Cenduodecillion, Centredecillion, Cenquattuordecillion, Cenquindecillion, Censexdecillion, Censeptendecillion, Cenoctodecillion, Cennovemdecillion, Cenvigintillion, Cenunvigintillion, Cenduovigintillion, Centrevigintillion, Cenquattuorvigintillion, Cenquinvigintillion, Censexvigintillion, Censeptemvigintillion, Cenoctovigintillion, Cennovemvigintillion, Centrigintillion, Cenuntrigintillion, Cenduotrigintillion, Centretrigintillion, Cenquattuortrigintillion, Cenquintrigintillion, Censextrigintillion, Censeptentrigintillion, Cenoctotrigintillion, Cennovemtrigintillion, Cenquadragintillion, Cenunquadragintillion, Cenduoquadragintillion, Centrequadragintillion, Cenquattuorquadragintillion, Cenquinquadragintillion, Censexquadragintillion, Censeptenquadragintillion, Cenoctoquadragintillion, Cennovemquadragintillion, Cenquinquagintillion, Cenunquinquagintillion,
Cenduoquinquagintillion, Centrequinquagintillion, Cenquattuorquinquagintillion, Cenquinquinquagintillion, Censexquinquagintillion,
Censeptenquinquagintillion, Cenoctoquinquagintillion, Cennovemquinquagintillion, Censexagintillion, Cenunsexagintillion, Cenduosexagintillion, Centresexagintillion, Cenquattuorsexagintillion, Cenquinsexagintillion, Censexsexagintillion, Censeptensexagintillion, Cenoctosexagintillion, Cennovemsexagintillion, Censeptuagintillion, Cenunseptuagintillion, Cenduoseptuagintillion, Centreseptuagtillion, Cenquattuorseptuagintillion, Cenquinseptuagintillion, Censexseptuagintillion, Censeptenseptuagintillion, Cenoctoseptuagintillion, Cennovemseptuagintillion, Cenoctogintillion, Cenunoctogintillion, Cenduooctogintillion, Centreoctogintillion, Cenquattuoroctogintillion, Cenquinoctogintillion, Censexoctogintillion,
Censeptenoctogintillion, Cenoctooctogintillion, Cennovemoctogintillion, Cennonagintillion, Cenunnonagintillion, Cenduononagintillion,
Centrenonagintillion,Cenquattuornonagintillion,Cenquinnonagintillion,Censexnonagintillion,Censeptennonagintillion,Cenoctononagintillion, Cennovemnonagintillion, Ducentillion, Ducenmillion, Ducenbillion, Ducentrillion, Ducentquadrillion, Ducentquintillion, Ducentsextillion, Ducentseptillion, Ducentoctillion, Ducentnonillion, Ducentdecillion...  [Skipping to 300] Trecentillion, Trecenmillion, Trecenbillion, Trecentrillion, Trecenquadrillion, Trecenquintillion, Trecensextillion, Trecenseptillion, Trecenoctillion, Trecennonillion, Trecendecillion... [Skipping to 400] Quadrigentillion, Quadrigentmillion, Quadrigentbillion, Quadrigenttrillion, Quadrigentquadrillion, Quadrigentquintillion, Quadrigentsextillion, Quadrigentseptillion, Quadrigentoctillion, Quadrigentnonillion, Quadrigendecillion... [Skipping to 500] Quingentillion, Quingentmillion, Quingentbillion, Quingenttrillion, Quingentquadrillion, Quingentquintillion, Quingentsextillion, Quingentseptillion, Quingentoctillion, Quingentnonillion, Quingentdecillion... [Skipping to 600] Sescentillion, Sescentmillion, Sescentbillion, Sescenttrillion, Sescentquadrillion, Sescentquintillion, Sescentsextillion, Sescentseptillion, Sescentoctillion, Sescentnonillion, Sescentdecillion... [Skipping to 700] Septingentillion, Septingentmillion, Septingentbillion, Septingenttrillion, Septingentquadrillion, Septingentquintillion, Septingentsextillion, Septingentseptillion, Septingentoctillion, Septingentnonillion, Septingentdecillion... [Skipping to 800] Octingentillion, Octingentmillion, Octingentbillion, Octingenttrillion, Octingentquadrillion, Octingentquintillion, Octingentsextillion, Octingentseptillion, Octiginentoctillion, Octigentnonillion... [Skipping to 900] Nongentillion, Nongentmillion, Nongentbillion, Nongenttrillion, Nongentquadrillion, Nongentquintillion, Nongentsextillion, Nongentseptillion, Nongentoctillion, Nongentnonillion, Nongentdecillion... [Skipping to 1000]    Millillion, Millmillion, Millbillion, Milltrillion, Millquadrillion, Millquintillion, Millsextillion, Millseptillion, Milloctillion, Millnonillion, Milldecillion... [Skipping to 1555] Millquingentquinquagintillion, Millquingentsexquinquagintillion, Millquingentseptenquinquagintillion...


Hope you guys liked my large number list! Here's a more basic version of the list to end it off
[1-10, 10-100, 100-1000]
Million, Billion, Trillion, Quadrillion, Quintillion, Sextillion, Septillion, Octillion, Nonillion, Decillion, Vigintillion, Trigintillion, Quadragintillion, Quinquagintillion, Sexagintillion, Septuagintillion, Octogintillion, Nonagintillion, Centillion, Ducentillion, Trecentillion, Quadrigentillion, Quingentillion, Sesgentillion, Septingentillion, Octingentillion, Nongentillion, Millillion

--- Beyond this point is not offical and just me using past prefixes ---

[1000-10000, 10000-100000, 100000-1000000, 1000000-10000000]
Millillion, Cenmillillion, Ducenmillillion, Trecenmillillion, Quadrigentmillillion, Sescentmillillion, Septingentmillillion, Octingentmillillion, Nongentmillillion,

Millmillillion, Cenmillmillillion, Ducenmillmillillion, Trecenmillmillillion,  Quadrigentmillmillillion, Quingentmillmillillion, Sescentmillmillillion, Septingentmillmillillion, Octingentmillmillillion, Nongentmillmillillion, Millmillmillillion,

Cenmillmillmillillion, Ducenmillmillmillillion, Trecenmillmillmillillion, Quadrigentmillmillmillillion, Quingentmillmillmillillion, Sescentmillmillmillillion, Septingentmillmillmillillion, Octingentmillmillmillillion, Nongentmillmillmillillion,

Millmillmillmillillion,Cenmillmillmillmillillion, Ducenmillmillmillmillillion, Trecenmillmillmillmillillion, Quadrigentmillmillmillmillillion, Quingentmillmillmillmillillion, Sescentmillmillmillmillillion, Septigentmillmillmillmillillion, Octingentmillmillmillmillillion, Nongentmillmillmillmillillion, Millmillmillmillmillillion

And were done. Hope this helped you memorize large numbers, it's mostly prefixes by the way.