138877711568 has 80 divisors (see below), whose sum is σ = 277857216000. Its totient is φ = 67194349056.

The previous prime is 138877711559. The next prime is 138877711571. The reversal of 138877711568 is 865117778831.

It is a Cunningham number, because it is equal to 372663²-1.

It is a self number, because there is not a number n which added to its sum of digits gives 138877711568.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 110307323 + ... + 110308581.

It is an arithmetic number, because the mean of its divisors is an integer number (3473215200).

Almost surely, 2^138877711568 is an apocalyptic number.

It is an amenable number.

138877711568 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

138877711568 is a wasteful number, since it uses less digits than its factorization.

138877711568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2172 (or 2166 counting only the distinct ones).

The product of its digits is 15805440, while the sum is 62.

The spelling of 138877711568 in words is "one hundred thirty-eight billion, eight hundred seventy-seven million, seven hundred eleven thousand, five hundred sixty-eight".