625377664 has 32 divisors (see below), whose sum is σ = 1247237640. Its totient is φ = 312345600.

The previous prime is 625377631. The next prime is 625377679. The reversal of 625377664 is 466773526.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

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, 146764 + ... + 150964.

Almost surely, 2^625377664 is an apocalyptic number.

625377664 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

625377664 is a deficient number, since it is larger than the sum of its proper divisors (621859976).

625377664 is a wasteful number, since it uses less digits than its factorization.

625377664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5378 (or 5366 counting only the distinct ones).

The product of its digits is 1270080, while the sum is 46.

The square root of 625377664 is about 25007.5521393038. The cubic root of 625377664 is about 855.1601510244.

The spelling of 625377664 in words is "six hundred twenty-five million, three hundred seventy-seven thousand, six hundred sixty-four".