639523325936 has 40 divisors (see below), whose sum is σ = 1353505666224. Its totient is φ = 290308354560.

The previous prime is 639523325927. The next prime is 639523325971.

639523325936 is nontrivially palindromic in base 10.

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, 2266805 + ... + 2533268.

Almost surely, 2^639523325936 is an apocalyptic number.

It is an amenable number.

639523325936 is an abundant number, since it is smaller than the sum of its proper divisors (713982340288).

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

639523325936 is a wasteful number, since it uses less digits than its factorization.

639523325936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4800849 (or 4800843 counting only the distinct ones).

The product of its digits is 23619600, while the sum is 56.

The spelling of 639523325936 in words is "six hundred thirty-nine billion, five hundred twenty-three million, three hundred twenty-five thousand, nine hundred thirty-six".