639184880884 has 24 divisors (see below), whose sum is σ = 1231457119200. Its totient is φ = 287873088480.

The previous prime is 639184880849. The next prime is 639184880903. The reversal of 639184880884 is 488088481936.

It is a congruent number.

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, 66632494 + ... + 66642085.

It is an arithmetic number, because the mean of its divisors is an integer number (51310713300).

Almost surely, 2^639184880884 is an apocalyptic number.

It is an amenable number.

639184880884 is a deficient number, since it is larger than the sum of its proper divisors (592272238316).

639184880884 is a wasteful number, since it uses less digits than its factorization.

639184880884 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133274703 (or 133274701 counting only the distinct ones).

The product of its (nonzero) digits is 84934656, while the sum is 67.

The spelling of 639184880884 in words is "six hundred thirty-nine billion, one hundred eighty-four million, eight hundred eighty thousand, eight hundred eighty-four".