56501055657 has 10 divisors (see below), whose sum is σ = 84402811658. Its totient is φ = 37667370384.

The previous prime is 56501055647. The next prime is 56501055661. The reversal of 56501055657 is 75655010565.

It can be written as a sum of positive squares in only one way, i.e., 45646749801 + 10854305856 = 213651^2 + 104184^2 .

It is not a de Polignac number, because 56501055657 - 2⁷ = 56501055529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56501055647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 348771868 + ... + 348772029.

Almost surely, 2^56501055657 is an apocalyptic number.

It is an amenable number.

56501055657 is a deficient number, since it is larger than the sum of its proper divisors (27901756001).

56501055657 is an equidigital number, since it uses as much as digits as its factorization.

56501055657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 697543909 (or 697543900 counting only the distinct ones).

The product of its (nonzero) digits is 787500, while the sum is 45.

The spelling of 56501055657 in words is "fifty-six billion, five hundred one million, fifty-five thousand, six hundred fifty-seven".