639315516 has 48 divisors (see below), whose sum is σ = 1706082560. Its totient is φ = 182528640.

The previous prime is 639315491. The next prime is 639315539. The reversal of 639315516 is 615513936.

639315516 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 210255 + ... + 213273.

Almost surely, 2^639315516 is an apocalyptic number.

It is an amenable number.

639315516 is an abundant number, since it is smaller than the sum of its proper divisors (1066767044).

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

639315516 is a wasteful number, since it uses less digits than its factorization.

639315516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5554 (or 5552 counting only the distinct ones).

The product of its digits is 72900, while the sum is 39.

The square root of 639315516 is about 25284.6893593732. The cubic root of 639315516 is about 861.4665422394.

The spelling of 639315516 in words is "six hundred thirty-nine million, three hundred fifteen thousand, five hundred sixteen".