using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace P02SumOfDigits
{
    class Program
    {
        static void Main(string[] args)
        {
            int num = Int32.Parse(Console.ReadLine());

            int temp = num;
            int sum = 0;

            while (num != 0)
            {
                int product = 1;
                int digit = num % 10;
                num = num / 10;

                while (digit > 0)
                {
                    product *= digit;
                    digit--;
                }
                sum += product;
            }

            if (sum == temp)
            {
                Console.WriteLine("yes");
            }
            else
            {
                Console.WriteLine("no");
            }

        }
    }
}