630623664 has 80 divisors (see below), whose sum is σ = 1974695040. Its totient is φ = 191096640.

The previous prime is 630623663. The next prime is 630623701. The reversal of 630623664 is 466326036.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (630623663) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 61602 + ... + 71105.

It is an arithmetic number, because the mean of its divisors is an integer number (24683688).

Almost surely, 2^630623664 is an apocalyptic number.

It is an amenable number.

630623664 is an abundant number, since it is smaller than the sum of its proper divisors (1344071376).

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

630623664 is a wasteful number, since it uses less digits than its factorization.

630623664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132735 (or 132723 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 36.

The square root of 630623664 is about 25112.2214071157. The cubic root of 630623664 is about 857.5446750319.

The spelling of 630623664 in words is "six hundred thirty million, six hundred twenty-three thousand, six hundred sixty-four".