642508264 has 32 divisors (see below), whose sum is σ = 1228320000. Its totient is φ = 315012672.

The previous prime is 642508231. The next prime is 642508331. The reversal of 642508264 is 462805246.

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, 90757 + ... + 97579.

It is an arithmetic number, because the mean of its divisors is an integer number (38385000).

Almost surely, 2^642508264 is an apocalyptic number.

It is an amenable number.

642508264 is a deficient number, since it is larger than the sum of its proper divisors (585811736).

642508264 is a wasteful number, since it uses less digits than its factorization.

642508264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7057 (or 7053 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 37.

The square root of 642508264 is about 25347.7467243146. The cubic root of 642508264 is about 862.8982190812.

The spelling of 642508264 in words is "six hundred forty-two million, five hundred eight thousand, two hundred sixty-four".