639164873704 has 96 divisors (see below), whose sum is σ = 1424252160000. Its totient is φ = 268006607232.

The previous prime is 639164873689. The next prime is 639164873717. The reversal of 639164873704 is 407378461936.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 88413162 + ... + 88420390.

It is an arithmetic number, because the mean of its divisors is an integer number (14835960000).

Almost surely, 2^639164873704 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 639164873704, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (712126080000).

639164873704 is an abundant number, since it is smaller than the sum of its proper divisors (785087286296).

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

639164873704 is a wasteful number, since it uses less digits than its factorization.

639164873704 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12095 (or 12084 counting only the distinct ones).

The product of its (nonzero) digits is 18289152, while the sum is 58.

The spelling of 639164873704 in words is "six hundred thirty-nine billion, one hundred sixty-four million, eight hundred seventy-three thousand, seven hundred four".