12656332656 has 120 divisors (see below), whose sum is σ = 39972731760. Its totient is φ = 3702988800.

The previous prime is 12656332639. The next prime is 12656332679. The reversal of 12656332656 is 65623365621.

12656332656 is a `hidden beast` number, since 1 + 2 + 6 + 5 + 633 + 2 + 6 + 5 + 6 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 91825 + ... + 183696.

It is an arithmetic number, because the mean of its divisors is an integer number (333106098).

Almost surely, 2^12656332656 is an apocalyptic number.

12656332656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

12656332656 is an abundant number, since it is smaller than the sum of its proper divisors (27316399104).

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

12656332656 is a wasteful number, since it uses less digits than its factorization.

12656332656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275575 (or 275566 counting only the distinct ones).

The product of its digits is 1166400, while the sum is 45.

The spelling of 12656332656 in words is "twelve billion, six hundred fifty-six million, three hundred thirty-two thousand, six hundred fifty-six".