501564664 has 32 divisors (see below), whose sum is σ = 958230000. Its totient is φ = 246053632.

The previous prime is 501564653. The next prime is 501564673. The reversal of 501564664 is 466465105.

It is a super-2 number, since 2×501564664² = 503134224346865792, which contains 22 as substring.

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, 477612 + ... + 478660.

Almost surely, 2^501564664 is an apocalyptic number.

It is an amenable number.

501564664 is a deficient number, since it is larger than the sum of its proper divisors (456665336).

501564664 is a wasteful number, since it uses less digits than its factorization.

501564664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2127 (or 2123 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 37.

The square root of 501564664 is about 22395.6393969898. The cubic root of 501564664 is about 794.5275803015.

The spelling of 501564664 in words is "five hundred one million, five hundred sixty-four thousand, six hundred sixty-four".