565215664 has 40 divisors (see below), whose sum is σ = 1195985952. Its totient is φ = 257187840.

The previous prime is 565215661. The next prime is 565215683. The reversal of 565215664 is 466512565.

It is not an unprimeable number, because it can be changed into a prime (565215661) 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, 4369 + ... + 33904.

Almost surely, 2^565215664 is an apocalyptic number.

It is an amenable number.

565215664 is an abundant number, since it is smaller than the sum of its proper divisors (630770288).

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

565215664 is a wasteful number, since it uses less digits than its factorization.

565215664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38365 (or 38359 counting only the distinct ones).

The product of its digits is 216000, while the sum is 40.

The square root of 565215664 is about 23774.2647415225. The cubic root of 565215664 is about 826.8081134423.

It can be divided in two parts, 5652 and 15664, that added together give a square (21316 = 146²).

The spelling of 565215664 in words is "five hundred sixty-five million, two hundred fifteen thousand, six hundred sixty-four".