56577540373 has 2 divisors, whose sum is σ = 56577540374. Its totient is φ = 56577540372.

The previous prime is 56577540361. The next prime is 56577540391. The reversal of 56577540373 is 37304577565.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28366306929 + 28211233444 = 168423^2 + 167962^2 .

It is a cyclic number.

It is not a de Polignac number, because 56577540373 - 2²⁵ = 56543985941 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 56577540373.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56577540673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28288770186 + 28288770187.

It is an arithmetic number, because the mean of its divisors is an integer number (28288770187).

Almost surely, 2^56577540373 is an apocalyptic number.

It is an amenable number.

56577540373 is a deficient number, since it is larger than the sum of its proper divisors (1).

56577540373 is an equidigital number, since it uses as much as digits as its factorization.

56577540373 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9261000, while the sum is 52.

The spelling of 56577540373 in words is "fifty-six billion, five hundred seventy-seven million, five hundred forty thousand, three hundred seventy-three".