56561115556 has 36 divisors (see below), whose sum is σ = 108868548096. Its totient is φ = 25693008880.

The previous prime is 56561115511. The next prime is 56561115607. The reversal of 56561115556 is 65551116565.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 729261 + ... + 803083.

It is an arithmetic number, because the mean of its divisors is an integer number (3024126336).

Almost surely, 2^56561115556 is an apocalyptic number.

It is an amenable number.

56561115556 is a deficient number, since it is larger than the sum of its proper divisors (52307432540).

56561115556 is a wasteful number, since it uses less digits than its factorization.

56561115556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75432 (or 75419 counting only the distinct ones).

The product of its digits is 675000, while the sum is 46.

The spelling of 56561115556 in words is "fifty-six billion, five hundred sixty-one million, one hundred fifteen thousand, five hundred fifty-six".