56420574257 has 2 divisors, whose sum is σ = 56420574258. Its totient is φ = 56420574256.

The previous prime is 56420574227. The next prime is 56420574269. The reversal of 56420574257 is 75247502465.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40737770896 + 15682803361 = 201836^2 + 125231^2 .

It is a cyclic number.

It is not a de Polignac number, because 56420574257 - 2²⁴ = 56403797041 is a prime.

It is a super-2 number, since 2×56420574257² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (56420574227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28210287128 + 28210287129.

It is an arithmetic number, because the mean of its divisors is an integer number (28210287129).

Almost surely, 2^56420574257 is an apocalyptic number.

It is an amenable number.

56420574257 is a deficient number, since it is larger than the sum of its proper divisors (1).

56420574257 is an equidigital number, since it uses as much as digits as its factorization.

56420574257 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2352000, while the sum is 47.

The spelling of 56420574257 in words is "fifty-six billion, four hundred twenty million, five hundred seventy-four thousand, two hundred fifty-seven".