56591657 has 8 divisors (see below), whose sum is σ = 60158376. Its totient is φ = 53051392.

The previous prime is 56591627. The next prime is 56591669. The reversal of 56591657 is 75619565.

It can be written as a sum of positive squares in 4 ways, for example, as 19855936 + 36735721 = 4456^2 + 6061^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 56591657 - 2¹² = 56587561 is a prime.

It is not an unprimeable number, because it can be changed into a prime (56591627) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2108 + ... + 10845.

It is an arithmetic number, because the mean of its divisors is an integer number (7519797).

Almost surely, 2^56591657 is an apocalyptic number.

It is an amenable number.

56591657 is a deficient number, since it is larger than the sum of its proper divisors (3566719).

56591657 is a wasteful number, since it uses less digits than its factorization.

56591657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13227.

The product of its digits is 283500, while the sum is 44.

The square root of 56591657 is about 7522.7426514537. The cubic root of 56591657 is about 383.9288989633.

The spelling of 56591657 in words is "fifty-six million, five hundred ninety-one thousand, six hundred fifty-seven".