138877481864432 has 10 divisors (see below), whose sum is σ = 269075121112368. Its totient is φ = 69438740932208.

The previous prime is 138877481864419. The next prime is 138877481864477. The reversal of 138877481864432 is 234468184778831.

It is a self number, because there is not a number n which added to its sum of digits gives 138877481864432.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4339921308248 + ... + 4339921308279.

Almost surely, 2^{138877481864432} is an apocalyptic number.

It is an amenable number.

138877481864432 is a deficient number, since it is larger than the sum of its proper divisors (130197639247936).

138877481864432 is an equidigital number, since it uses as much as digits as its factorization.

138877481864432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8679842616535 (or 8679842616529 counting only the distinct ones).

The product of its digits is 1387266048, while the sum is 74.

The spelling of 138877481864432 in words is "one hundred thirty-eight trillion, eight hundred seventy-seven billion, four hundred eighty-one million, eight hundred sixty-four thousand, four hundred thirty-two".