565646564 has 12 divisors (see below), whose sum is σ = 1131293184. Its totient is φ = 242419944.

The previous prime is 565646527. The next prime is 565646611. The reversal of 565646564 is 465646565.

565646564 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10100804 + ... + 10100859.

It is an arithmetic number, because the mean of its divisors is an integer number (94274432).

Almost surely, 2^565646564 is an apocalyptic number.

It is an amenable number.

565646564 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

565646564 is a wasteful number, since it uses less digits than its factorization.

565646564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20201674 (or 20201672 counting only the distinct ones).

The product of its digits is 2592000, while the sum is 47.

The square root of 565646564 is about 23783.3253352007. The cubic root of 565646564 is about 827.0181696155.

Subtracting from 565646564 its reverse (465646565), we obtain a palindrome (99999999).

The spelling of 565646564 in words is "five hundred sixty-five million, six hundred forty-six thousand, five hundred sixty-four".