56166313644 has 72 divisors (see below), whose sum is σ = 167853372960. Its totient is φ = 15494153472.

The previous prime is 56166313631. The next prime is 56166313669. The reversal of 56166313644 is 44631366165.

56166313644 is a `hidden beast` number, since 5 + 6 + 1 + 6 + 631 + 3 + 6 + 4 + 4 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 56166313644.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3835489 + ... + 3850104.

Almost surely, 2^56166313644 is an apocalyptic number.

It is an amenable number.

56166313644 is an abundant number, since it is smaller than the sum of its proper divisors (111687059316).

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

56166313644 is a wasteful number, since it uses less digits than its factorization.

56166313644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7685639 (or 7685634 counting only the distinct ones).

The product of its digits is 933120, while the sum is 45.

The spelling of 56166313644 in words is "fifty-six billion, one hundred sixty-six million, three hundred thirteen thousand, six hundred forty-four".