56577568281 has 32 divisors (see below), whose sum is σ = 81490187520. Its totient is φ = 34709762304.

The previous prime is 56577568277. The next prime is 56577568297. The reversal of 56577568281 is 18286577565.

It is not a de Polignac number, because 56577568281 - 2² = 56577568277 is a prime.

It is a super-2 number, since 2×56577568281² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (56577568261) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21372900 + ... + 21375546.

It is an arithmetic number, because the mean of its divisors is an integer number (2546568360).

Almost surely, 2^56577568281 is an apocalyptic number.

It is an amenable number.

56577568281 is a deficient number, since it is larger than the sum of its proper divisors (24912619239).

56577568281 is a wasteful number, since it uses less digits than its factorization.

56577568281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4145.

The product of its digits is 28224000, while the sum is 60.

The spelling of 56577568281 in words is "fifty-six billion, five hundred seventy-seven million, five hundred sixty-eight thousand, two hundred eighty-one".