138761908432 has 40 divisors (see below), whose sum is σ = 307276491776. Its totient is φ = 59465909376.

The previous prime is 138761908421. The next prime is 138761908447. The reversal of 138761908432 is 234809167831.

It is a self number, because there is not a number n which added to its sum of digits gives 138761908432.

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, 3066838 + ... + 3111754.

Almost surely, 2^138761908432 is an apocalyptic number.

It is an amenable number.

138761908432 is an abundant number, since it is smaller than the sum of its proper divisors (168514583344).

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

138761908432 is a wasteful number, since it uses less digits than its factorization.

138761908432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72515 (or 72509 counting only the distinct ones).

The product of its (nonzero) digits is 1741824, while the sum is 52.

The spelling of 138761908432 in words is "one hundred thirty-eight billion, seven hundred sixty-one million, nine hundred eight thousand, four hundred thirty-two".