725607664 has 10 divisors (see below), whose sum is σ = 1405864880. Its totient is φ = 362803824.

The previous prime is 725607647. The next prime is 725607713. The reversal of 725607664 is 466706527.

It is a self number, because there is not a number n which added to its sum of digits gives 725607664.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22675224 + ... + 22675255.

It is an arithmetic number, because the mean of its divisors is an integer number (140586488).

Almost surely, 2^725607664 is an apocalyptic number.

It is an amenable number.

725607664 is a deficient number, since it is larger than the sum of its proper divisors (680257216).

725607664 is a wasteful number, since it uses less digits than its factorization.

725607664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45350487 (or 45350481 counting only the distinct ones).

The product of its (nonzero) digits is 423360, while the sum is 43.

The square root of 725607664 is about 26937.1057094113. The cubic root of 725607664 is about 898.6018059166.

The spelling of 725607664 in words is "seven hundred twenty-five million, six hundred seven thousand, six hundred sixty-four".