56561688844 has 12 divisors (see below), whose sum is σ = 99028396600. Its totient is φ = 28267861248.

The previous prime is 56561688763. The next prime is 56561688857. The reversal of 56561688844 is 44888616565.

It is a happy number.

It is a hoax number, since the sum of its digits (61) coincides with the sum of the digits of its distinct prime factors.

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 3 ways as a sum of consecutive naturals, for example, 3235989 + ... + 3253420.

Almost surely, 2^56561688844 is an apocalyptic number.

It is an amenable number.

56561688844 is a deficient number, since it is larger than the sum of its proper divisors (42466707756).

56561688844 is a wasteful number, since it uses less digits than its factorization.

56561688844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6491592 (or 6491590 counting only the distinct ones).

The product of its digits is 44236800, while the sum is 61.

The spelling of 56561688844 in words is "fifty-six billion, five hundred sixty-one million, six hundred eighty-eight thousand, eight hundred forty-four".