639979642152 has 48 divisors (see below), whose sum is σ = 1750106161440. Its totient is φ = 211255413408.

The previous prime is 639979642103. The next prime is 639979642163. The reversal of 639979642152 is 251246979936.

639979642152 is a `hidden beast` number, since 6 + 3 + 99 + 79 + 6 + 421 + 52 = 666.

It is a super-2 number, since 2×639979642152² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 639979642152.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 43141158 + ... + 43155989.

It is an arithmetic number, because the mean of its divisors is an integer number (36460545030).

Almost surely, 2^639979642152 is an apocalyptic number.

It is an amenable number.

639979642152 is an abundant number, since it is smaller than the sum of its proper divisors (1110126519288).

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

639979642152 is a wasteful number, since it uses less digits than its factorization.

639979642152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86297262 (or 86297255 counting only the distinct ones).

The product of its digits is 44089920, while the sum is 63.

The spelling of 639979642152 in words is "six hundred thirty-nine billion, nine hundred seventy-nine million, six hundred forty-two thousand, one hundred fifty-two".