maximum row number that can be returned by dbms_rowid

maximum row number that can be returned by dbms_rowid
65535

SQL> select dbms_rowid.rowid_row_number('AAAAAAAAAAAAAAAAAA') from dual;

DBMS_ROWID.ROWID_ROW_NUMBER('AAAAAAAAAAAAAAAAAA')
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                                                0

SQL> select dbms_rowid.rowid_row_number('AAAAAAAAAAAAAAAAAB') from dual;

DBMS_ROWID.ROWID_ROW_NUMBER('AAAAAAAAAAAAAAAAAB')
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                                                1

SQL> select dbms_rowid.rowid_row_number('AAAAAAAAAAAAAAAP//') from dual;

DBMS_ROWID.ROWID_ROW_NUMBER('AAAAAAAAAAAAAAAP//')
-------------------------------------------------
                                            65535

SQL> select dbms_rowid.rowid_row_number('AAAAAAAAAAAAAAAQAA') from dual;

DBMS_ROWID.ROWID_ROW_NUMBER('AAAAAAAAAAAAAAAQAA')
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                                                0