639913684000 has 96 divisors (see below), whose sum is σ = 1572540383232. Its totient is φ = 255921120000.

The previous prime is 639913683979. The next prime is 639913684099. The reversal of 639913684000 is 486319936.

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, 32754235 + ... + 32773765.

It is an arithmetic number, because the mean of its divisors is an integer number (16380628992).

Almost surely, 2^639913684000 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 639913684000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (786270191616).

639913684000 is an abundant number, since it is smaller than the sum of its proper divisors (932626699232).

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

639913684000 is a wasteful number, since it uses less digits than its factorization.

639913684000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27747 (or 27729 counting only the distinct ones).

The product of its (nonzero) digits is 839808, while the sum is 49.

The spelling of 639913684000 in words is "six hundred thirty-nine billion, nine hundred thirteen million, six hundred eighty-four thousand".