264396564 has 18 divisors (see below), whose sum is σ = 668335850. Its totient is φ = 88132176.

The previous prime is 264396541. The next prime is 264396581. The reversal of 264396564 is 465693462.

It can be written as a sum of positive squares in only one way, i.e., 181440900 + 82955664 = 13470^2 + 9108^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3672139 + ... + 3672210.

Almost surely, 2^264396564 is an apocalyptic number.

It is an amenable number.

264396564 is an abundant number, since it is smaller than the sum of its proper divisors (403939286).

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

264396564 is a wasteful number, since it uses less digits than its factorization.

264396564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7344359 (or 7344354 counting only the distinct ones).

The product of its digits is 933120, while the sum is 45.

The square root of 264396564 is about 16260.2756434201. The cubic root of 264396564 is about 641.8279155630.

The spelling of 264396564 in words is "two hundred sixty-four million, three hundred ninety-six thousand, five hundred sixty-four".