56577368513 has 2 divisors, whose sum is σ = 56577368514. Its totient is φ = 56577368512.

The previous prime is 56577368509. The next prime is 56577368521. The reversal of 56577368513 is 31586377565.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 43283970304 + 13293398209 = 208048^2 + 115297^2 .

It is a cyclic number.

It is not a de Polignac number, because 56577368513 - 2² = 56577368509 is a prime.

It is not a weakly prime, because it can be changed into another prime (56577368413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28288684256 + 28288684257.

It is an arithmetic number, because the mean of its divisors is an integer number (28288684257).

Almost surely, 2^56577368513 is an apocalyptic number.

It is an amenable number.

56577368513 is a deficient number, since it is larger than the sum of its proper divisors (1).

56577368513 is an equidigital number, since it uses as much as digits as its factorization.

56577368513 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15876000, while the sum is 56.

The spelling of 56577368513 in words is "fifty-six billion, five hundred seventy-seven million, three hundred sixty-eight thousand, five hundred thirteen".