138752656788 has 48 divisors (see below), whose sum is σ = 337053588480. Its totient is φ = 44371576704.

The previous prime is 138752656787. The next prime is 138752656793. The reversal of 138752656788 is 887656257831.

It is a Smith number, since the sum of its digits (66) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138752656787) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1215156 + ... + 1324427.

It is an arithmetic number, because the mean of its divisors is an integer number (7021949760).

Almost surely, 2^138752656788 is an apocalyptic number.

It is an amenable number.

138752656788 is an abundant number, since it is smaller than the sum of its proper divisors (198300931692).

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

138752656788 is a wasteful number, since it uses less digits than its factorization.

138752656788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2539776 (or 2539774 counting only the distinct ones).

The product of its digits is 135475200, while the sum is 66.

The spelling of 138752656788 in words is "one hundred thirty-eight billion, seven hundred fifty-two million, six hundred fifty-six thousand, seven hundred eighty-eight".