56561000016 has 40 divisors (see below), whose sum is σ = 154710972864. Its totient is φ = 17744627200.

The previous prime is 56560999969. The next prime is 56561000057. The reversal of 56561000016 is 61000016565.

It is a congruent number.

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, 34656660 + ... + 34658291.

Almost surely, 2^56561000016 is an apocalyptic number.

It is an amenable number.

56561000016 is an abundant number, since it is smaller than the sum of its proper divisors (98149972848).

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

56561000016 is a wasteful number, since it uses less digits than its factorization.

56561000016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69314979 (or 69314973 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 30.

The spelling of 56561000016 in words is "fifty-six billion, five hundred sixty-one million, sixteen", and thus it is an aban number.