56566516656 has 80 divisors (see below), whose sum is σ = 159719888384. Its totient is φ = 17145292032.

The previous prime is 56566516639. The next prime is 56566516679. The reversal of 56566516656 is 65661566565.

It is a junction number, because it is equal to n+sod(n) for n = 56566516596 and 56566516605.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 634696 + ... + 718311.

Almost surely, 2^56566516656 is an apocalyptic number.

It is an amenable number.

56566516656 is an abundant number, since it is smaller than the sum of its proper divisors (103153371728).

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

56566516656 is a wasteful number, since it uses less digits than its factorization.

56566516656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1353098 (or 1353092 counting only the distinct ones).

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

The spelling of 56566516656 in words is "fifty-six billion, five hundred sixty-six million, five hundred sixteen thousand, six hundred fifty-six".