250640664 has 32 divisors (see below), whose sum is σ = 643539120. Its totient is φ = 81288576.

The previous prime is 250640653. The next prime is 250640681. The reversal of 250640664 is 466046052.

250640664 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 140239 + ... + 142014.

Almost surely, 2^250640664 is an apocalyptic number.

250640664 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

250640664 is an abundant number, since it is smaller than the sum of its proper divisors (392898456).

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

250640664 is a wasteful number, since it uses less digits than its factorization.

250640664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 282299 (or 282295 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 33.

The square root of 250640664 is about 15831.6349124151. The cubic root of 250640664 is about 630.4981899648.

The spelling of 250640664 in words is "two hundred fifty million, six hundred forty thousand, six hundred sixty-four".