251872664 has 32 divisors (see below), whose sum is σ = 498970800. Its totient is φ = 118863360.

The previous prime is 251872661. The next prime is 251872669. The reversal of 251872664 is 466278152.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (251872661) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39764 + ... + 45660.

Almost surely, 2^251872664 is an apocalyptic number.

It is an amenable number.

251872664 is a deficient number, since it is larger than the sum of its proper divisors (247098136).

251872664 is a wasteful number, since it uses less digits than its factorization.

251872664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6203 (or 6199 counting only the distinct ones).

The product of its digits is 161280, while the sum is 41.

The square root of 251872664 is about 15870.4966525941. The cubic root of 251872664 is about 631.5295529568.

The spelling of 251872664 in words is "two hundred fifty-one million, eight hundred seventy-two thousand, six hundred sixty-four".