56161657 has 2 divisors, whose sum is σ = 56161658. Its totient is φ = 56161656.

The previous prime is 56161627. The next prime is 56161667. The reversal of 56161657 is 75616165.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 45212176 + 10949481 = 6724^2 + 3309^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56161657 is a prime.

It is not a weakly prime, because it can be changed into another prime (56161627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28080828 + 28080829.

It is an arithmetic number, because the mean of its divisors is an integer number (28080829).

Almost surely, 2^56161657 is an apocalyptic number.

It is an amenable number.

56161657 is a deficient number, since it is larger than the sum of its proper divisors (1).

56161657 is an equidigital number, since it uses as much as digits as its factorization.

56161657 is an evil number, because the sum of its binary digits is even.

The product of its digits is 37800, while the sum is 37.

The square root of 56161657 is about 7494.1081524088. The cubic root of 56161657 is about 382.9540242085.

The spelling of 56161657 in words is "fifty-six million, one hundred sixty-one thousand, six hundred fifty-seven".