268664564 has 24 divisors (see below), whose sum is σ = 560692608. Its totient is φ = 110135520.

The previous prime is 268664533. The next prime is 268664657. The reversal of 268664564 is 465466862.

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, 207947 + ... + 209234.

It is an arithmetic number, because the mean of its divisors is an integer number (23362192).

Almost surely, 2^268664564 is an apocalyptic number.

It is an amenable number.

268664564 is an abundant number, since it is smaller than the sum of its proper divisors (292028044).

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

268664564 is a wasteful number, since it uses less digits than its factorization.

268664564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 417215 (or 417213 counting only the distinct ones).

The product of its digits is 1658880, while the sum is 47.

The square root of 268664564 is about 16390.9903300563. The cubic root of 268664564 is about 645.2630491675.

The spelling of 268664564 in words is "two hundred sixty-eight million, six hundred sixty-four thousand, five hundred sixty-four".