564444664 has 32 divisors (see below), whose sum is σ = 1210337280. Its totient is φ = 241742304.

The previous prime is 564444653. The next prime is 564444677. The reversal of 564444664 is 466444465.

It is a self number, because there is not a number n which added to its sum of digits gives 564444664.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 121309 + ... + 125875.

It is an arithmetic number, because the mean of its divisors is an integer number (37823040).

Almost surely, 2^564444664 is an apocalyptic number.

It is an amenable number.

564444664 is an abundant number, since it is smaller than the sum of its proper divisors (645892616).

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

564444664 is a wasteful number, since it uses less digits than its factorization.

564444664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6787 (or 6783 counting only the distinct ones).

The product of its digits is 1105920, while the sum is 43.

The square root of 564444664 is about 23758.0441955983. The cubic root of 564444664 is about 826.4319979351.

The spelling of 564444664 in words is "five hundred sixty-four million, four hundred forty-four thousand, six hundred sixty-four".