12956663888 has 30 divisors (see below), whose sum is σ = 29202074586. Its totient is φ = 5552855616.

The previous prime is 12956663873. The next prime is 12956663891. The reversal of 12956663888 is 88836665921.

It can be written as a sum of positive squares in only one way, i.e., 12600511504 + 356152384 = 112252^2 + 18872^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 12956663888.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8262395 + ... + 8263962.

Almost surely, 2^12956663888 is an apocalyptic number.

It is an amenable number.

12956663888 is an abundant number, since it is smaller than the sum of its proper divisors (16245410698).

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

12956663888 is a wasteful number, since it uses less digits than its factorization.

12956663888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16526379 (or 16526366 counting only the distinct ones).

The product of its digits is 29859840, while the sum is 62.

The spelling of 12956663888 in words is "twelve billion, nine hundred fifty-six million, six hundred sixty-three thousand, eight hundred eighty-eight".