513634664 has 16 divisors (see below), whose sum is σ = 973887300. Its totient is φ = 253931392.

The previous prime is 513634633. The next prime is 513634687. The reversal of 513634664 is 466436315.

It can be written as a sum of positive squares in 2 ways, for example, as 481802500 + 31832164 = 21950^2 + 5642^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 359987 + ... + 361410.

Almost surely, 2^513634664 is an apocalyptic number.

It is an amenable number.

513634664 is a deficient number, since it is larger than the sum of its proper divisors (460252636).

513634664 is a wasteful number, since it uses less digits than its factorization.

513634664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 721492 (or 721488 counting only the distinct ones).

The product of its digits is 155520, while the sum is 38.

The square root of 513634664 is about 22663.5095252258. The cubic root of 513634664 is about 800.8504830279.

The spelling of 513634664 in words is "five hundred thirteen million, six hundred thirty-four thousand, six hundred sixty-four".