56915515656 has 96 divisors (see below), whose sum is σ = 160133126400. Its totient is φ = 18242789760.

The previous prime is 56915515637. The next prime is 56915515667. The reversal of 56915515656 is 65651551965.

56915515656 is a `hidden beast` number, since 5 + 69 + 1 + 5 + 515 + 65 + 6 = 666.

It is a super-2 number, since 2×56915515656² (a number of 22 digits) contains 22 as substring.

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, 269215 + ... + 431633.

It is an arithmetic number, because the mean of its divisors is an integer number (1668053400).

Almost surely, 2^56915515656 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 56915515656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80066563200).

56915515656 is an abundant number, since it is smaller than the sum of its proper divisors (103217610744).

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

56915515656 is a wasteful number, since it uses less digits than its factorization.

56915515656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162619 (or 162612 counting only the distinct ones).

The product of its digits is 6075000, while the sum is 54.

The spelling of 56915515656 in words is "fifty-six billion, nine hundred fifteen million, five hundred fifteen thousand, six hundred fifty-six".