12688411920 has 40 divisors (see below), whose sum is σ = 39334077696. Its totient is φ = 3383576448.

The previous prime is 12688411919. The next prime is 12688411927. The reversal of 12688411920 is 2911488621.

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (12688411927) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26433952 + ... + 26434431.

Almost surely, 2^12688411920 is an apocalyptic number.

12688411920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12688411920 is an abundant number, since it is smaller than the sum of its proper divisors (26645665776).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12688411920 is a wasteful number, since it uses less digits than its factorization.

12688411920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52868399 (or 52868393 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 42.

The spelling of 12688411920 in words is "twelve billion, six hundred eighty-eight million, four hundred eleven thousand, nine hundred twenty".