538625664 has 48 divisors (see below), whose sum is σ = 1549954770. Its totient is φ = 179541504.

The previous prime is 538625641. The next prime is 538625677. The reversal of 538625664 is 466526835.

538625664 is a `hidden beast` number, since 5 + 3 + 86 + 2 + 566 + 4 = 666.

It can be written as a sum of positive squares in only one way, i.e., 538611264 + 14400 = 23208^2 + 120^2 .

It is a tau number, because it is divible by the number of its divisors (48).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 232627 + ... + 234930.

Almost surely, 2^538625664 is an apocalyptic number.

It is an amenable number.

538625664 is an abundant number, since it is smaller than the sum of its proper divisors (1011329106).

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

538625664 is a wasteful number, since it uses less digits than its factorization.

538625664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 467577 (or 467562 counting only the distinct ones).

The product of its digits is 1036800, while the sum is 45.

The square root of 538625664 is about 23208.3102357755. The cubic root of 538625664 is about 813.6338606931.

The spelling of 538625664 in words is "five hundred thirty-eight million, six hundred twenty-five thousand, six hundred sixty-four".