56775057769 has 2 divisors, whose sum is σ = 56775057770. Its totient is φ = 56775057768.

The previous prime is 56775057683. The next prime is 56775057797. The reversal of 56775057769 is 96775057765.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 56459462544 + 315595225 = 237612^2 + 17765^2 .

It is a cyclic number.

It is not a de Polignac number, because 56775057769 - 2²⁵ = 56741503337 is a prime.

It is a super-2 number, since 2×56775057769² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 56775057769.

It is not a weakly prime, because it can be changed into another prime (56775057799) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28387528884 + 28387528885.

It is an arithmetic number, because the mean of its divisors is an integer number (28387528885).

Almost surely, 2^56775057769 is an apocalyptic number.

It is an amenable number.

56775057769 is a deficient number, since it is larger than the sum of its proper divisors (1).

56775057769 is an equidigital number, since it uses as much as digits as its factorization.

56775057769 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 97240500, while the sum is 64.

The spelling of 56775057769 in words is "fifty-six billion, seven hundred seventy-five million, fifty-seven thousand, seven hundred sixty-nine".