56659569 has 4 divisors (see below), whose sum is σ = 75546096. Its totient is φ = 37773044.

The previous prime is 56659553. The next prime is 56659601. The reversal of 56659569 is 96595665.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 56659569 - 2⁴ = 56659553 is a prime.

It is a super-2 number, since 2×56659569² = 6420613518531522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (56659549) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9443259 + ... + 9443264.

It is an arithmetic number, because the mean of its divisors is an integer number (18886524).

Almost surely, 2^56659569 is an apocalyptic number.

It is an amenable number.

56659569 is a deficient number, since it is larger than the sum of its proper divisors (18886527).

56659569 is a wasteful number, since it uses less digits than its factorization.

56659569 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18886526.

The product of its digits is 2187000, while the sum is 51.

The square root of 56659569 is about 7527.2550773838. The cubic root of 56659569 is about 384.0824136806.

The spelling of 56659569 in words is "fifty-six million, six hundred fifty-nine thousand, five hundred sixty-nine".