56561615016 has 16 divisors (see below), whose sum is σ = 141404037600. Its totient is φ = 18853871664.

The previous prime is 56561614997. The next prime is 56561615021. The reversal of 56561615016 is 61051616565.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1178366956 + ... + 1178367003.

It is an arithmetic number, because the mean of its divisors is an integer number (8837752350).

Almost surely, 2^56561615016 is an apocalyptic number.

It is an amenable number.

56561615016 is an abundant number, since it is smaller than the sum of its proper divisors (84842422584).

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

56561615016 is a wasteful number, since it uses less digits than its factorization.

56561615016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2356733968 (or 2356733964 counting only the distinct ones).

The product of its (nonzero) digits is 162000, while the sum is 42.

The spelling of 56561615016 in words is "fifty-six billion, five hundred sixty-one million, six hundred fifteen thousand, sixteen".