15656656656 has 40 divisors (see below), whose sum is σ = 40562966304. Its totient is φ = 5203840000.

The previous prime is 15656656643. The next prime is 15656656667. The reversal of 15656656656 is 65665665651.

15656656656 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 15656656596 and 15656656605.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 453345 + ... + 486656.

Almost surely, 2^15656656656 is an apocalyptic number.

15656656656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

15656656656 is an abundant number, since it is smaller than the sum of its proper divisors (24906309648).

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

15656656656 is a wasteful number, since it uses less digits than its factorization.

15656656656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 940359 (or 940353 counting only the distinct ones).

The product of its digits is 29160000, while the sum is 57.

The spelling of 15656656656 in words is "fifteen billion, six hundred fifty-six million, six hundred fifty-six thousand, six hundred fifty-six".