56563657 has 2 divisors, whose sum is σ = 56563658. Its totient is φ = 56563656.

The previous prime is 56563651. The next prime is 56563669. The reversal of 56563657 is 75636565.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 53860921 + 2702736 = 7339^2 + 1644^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56563657 is a prime.

It is not a weakly prime, because it can be changed into another prime (56563651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28281828 + 28281829.

It is an arithmetic number, because the mean of its divisors is an integer number (28281829).

Almost surely, 2^56563657 is an apocalyptic number.

It is an amenable number.

56563657 is a deficient number, since it is larger than the sum of its proper divisors (1).

56563657 is an equidigital number, since it uses as much as digits as its factorization.

56563657 is an evil number, because the sum of its binary digits is even.

The product of its digits is 567000, while the sum is 43.

The square root of 56563657 is about 7520.8813978150. The cubic root of 56563657 is about 383.8655693539.

The spelling of 56563657 in words is "fifty-six million, five hundred sixty-three thousand, six hundred fifty-seven".