642616604 has 24 divisors (see below), whose sum is σ = 1285939200. Its totient is φ = 275255856.

The previous prime is 642616549. The next prime is 642616607. The reversal of 642616604 is 406616246.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642616607) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56597 + ... + 66995.

It is an arithmetic number, because the mean of its divisors is an integer number (53580800).

Almost surely, 2^642616604 is an apocalyptic number.

It is an amenable number.

642616604 is an abundant number, since it is smaller than the sum of its proper divisors (643322596).

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

642616604 is a wasteful number, since it uses less digits than its factorization.

642616604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12617 (or 12615 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 35.

The square root of 642616604 is about 25349.8837078200. The cubic root of 642616604 is about 862.9467171028.

The spelling of 642616604 in words is "six hundred forty-two million, six hundred sixteen thousand, six hundred four".