56566136544 has 48 divisors (see below), whose sum is σ = 149315685120. Its totient is φ = 18750035840.

The previous prime is 56566136533. The next prime is 56566136563. The reversal of 56566136544 is 44563166565.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1628712 + ... + 1663079.

It is an arithmetic number, because the mean of its divisors is an integer number (3110743440).

Almost surely, 2^56566136544 is an apocalyptic number.

It is an amenable number.

56566136544 is an abundant number, since it is smaller than the sum of its proper divisors (92749548576).

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

56566136544 is a wasteful number, since it uses less digits than its factorization.

56566136544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3291983 (or 3291975 counting only the distinct ones).

The product of its digits is 7776000, while the sum is 51.

The spelling of 56566136544 in words is "fifty-six billion, five hundred sixty-six million, one hundred thirty-six thousand, five hundred forty-four".