138881320132 has 24 divisors (see below), whose sum is σ = 244826265600. Its totient is φ = 68931103776.

The previous prime is 138881320099. The next prime is 138881320177. The reversal of 138881320132 is 231023188831.

It is a happy 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, 5153469 + ... + 5180347.

It is an arithmetic number, because the mean of its divisors is an integer number (10201094400).

Almost surely, 2^138881320132 is an apocalyptic number.

It is an amenable number.

138881320132 is a deficient number, since it is larger than the sum of its proper divisors (105944945468).

138881320132 is a wasteful number, since it uses less digits than its factorization.

138881320132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36315 (or 36313 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 40.

The spelling of 138881320132 in words is "one hundred thirty-eight billion, eight hundred eighty-one million, three hundred twenty thousand, one hundred thirty-two".