642610264 has 16 divisors (see below), whose sum is σ = 1205615520. Its totient is φ = 321112800.

The previous prime is 642610231. The next prime is 642610277. The reversal of 642610264 is 462016246.

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, 9312 + ... + 37039.

It is an arithmetic number, because the mean of its divisors is an integer number (75350970).

Almost surely, 2^642610264 is an apocalyptic number.

It is an amenable number.

642610264 is a deficient number, since it is larger than the sum of its proper divisors (563005256).

642610264 is a wasteful number, since it uses less digits than its factorization.

642610264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48090 (or 48086 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 31.

The square root of 642610264 is about 25349.7586576283. The cubic root of 642610264 is about 862.9438791742.

The spelling of 642610264 in words is "six hundred forty-two million, six hundred ten thousand, two hundred sixty-four".