56577408681 has 16 divisors (see below), whose sum is σ = 77942424960. Its totient is φ = 36485379840.

The previous prime is 56577408673. The next prime is 56577408761. The reversal of 56577408681 is 18680477565.

It is a happy number.

It is not a de Polignac number, because 56577408681 - 2³ = 56577408673 is a prime.

It is a super-2 number, since 2×56577408681² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (56577401681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2494576 + ... + 2517153.

It is an arithmetic number, because the mean of its divisors is an integer number (4871401560).

Almost surely, 2^56577408681 is an apocalyptic number.

It is an amenable number.

56577408681 is a deficient number, since it is larger than the sum of its proper divisors (21365016279).

56577408681 is a wasteful number, since it uses less digits than its factorization.

56577408681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5011856.

The product of its (nonzero) digits is 11289600, while the sum is 57.

The spelling of 56577408681 in words is "fifty-six billion, five hundred seventy-seven million, four hundred eight thousand, six hundred eighty-one".