639529000120 has 16 divisors (see below), whose sum is σ = 1438940250360. Its totient is φ = 255811600032.

The previous prime is 639529000111. The next prime is 639529000129. The reversal of 639529000120 is 21000925936.

639529000120 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (639529000111) and next prime (639529000129).

It is a self number, because there is not a number n which added to its sum of digits gives 639529000120.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (639529000129) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7994112462 + ... + 7994112541.

Almost surely, 2^639529000120 is an apocalyptic number.

It is an amenable number.

639529000120 is an abundant number, since it is smaller than the sum of its proper divisors (799411250240).

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

639529000120 is a wasteful number, since it uses less digits than its factorization.

639529000120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15988225014 (or 15988225010 counting only the distinct ones).

The product of its (nonzero) digits is 29160, while the sum is 37.

The spelling of 639529000120 in words is "six hundred thirty-nine billion, five hundred twenty-nine million, one hundred twenty", and thus it is an aban number.