565605664 has 96 divisors (see below), whose sum is σ = 1259919360. Its totient is φ = 248140800.

The previous prime is 565605653. The next prime is 565605671. The reversal of 565605664 is 466506565.

It is a self number, because there is not a number n which added to its sum of digits gives 565605664.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 786297 + ... + 787015.

It is an arithmetic number, because the mean of its divisors is an integer number (13124160).

Almost surely, 2^565605664 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 565605664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (629959680).

565605664 is an abundant number, since it is smaller than the sum of its proper divisors (694313696).

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

565605664 is a wasteful number, since it uses less digits than its factorization.

565605664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 834 (or 826 counting only the distinct ones).

The product of its (nonzero) digits is 648000, while the sum is 43.

The square root of 565605664 is about 23782.4654735374. The cubic root of 565605664 is about 826.9982361679.

Subtracting from 565605664 its reverse (466506565), we obtain a palindrome (99099099).

The spelling of 565605664 in words is "five hundred sixty-five million, six hundred five thousand, six hundred sixty-four".