56577568277 has 2 divisors, whose sum is σ = 56577568278. Its totient is φ = 56577568276.

The previous prime is 56577568261. The next prime is 56577568297. The reversal of 56577568277 is 77286577565.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 37778141956 + 18799426321 = 194366^2 + 137111^2 .

It is a cyclic number.

It is not a de Polignac number, because 56577568277 - 2⁴ = 56577568261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56577568297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28288784138 + 28288784139.

It is an arithmetic number, because the mean of its divisors is an integer number (28288784139).

Almost surely, 2^56577568277 is an apocalyptic number.

It is an amenable number.

56577568277 is a deficient number, since it is larger than the sum of its proper divisors (1).

56577568277 is an equidigital number, since it uses as much as digits as its factorization.

56577568277 is an evil number, because the sum of its binary digits is even.

The product of its digits is 172872000, while the sum is 65.

The spelling of 56577568277 in words is "fifty-six billion, five hundred seventy-seven million, five hundred sixty-eight thousand, two hundred seventy-seven".