639195936056 has 16 divisors (see below), whose sum is σ = 1203772085640. Its totient is φ = 318190046560.

The previous prime is 639195936037. The next prime is 639195936077. The reversal of 639195936056 is 650639591936.

639195936056 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 639195936056.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 175988255 + ... + 175991886.

Almost surely, 2^639195936056 is an apocalyptic number.

It is an amenable number.

639195936056 is a deficient number, since it is larger than the sum of its proper divisors (564576149584).

639195936056 is a wasteful number, since it uses less digits than its factorization.

639195936056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 351980374 (or 351980370 counting only the distinct ones).

The product of its (nonzero) digits is 35429400, while the sum is 62.

The spelling of 639195936056 in words is "six hundred thirty-nine billion, one hundred ninety-five million, nine hundred thirty-six thousand, fifty-six".