138889628542 has 32 divisors (see below), whose sum is σ = 239790456000. Its totient is φ = 59100960768.

The previous prime is 138889628539. The next prime is 138889628617. The reversal of 138889628542 is 245826988831.

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, 5805918 + ... + 5829790.

It is an arithmetic number, because the mean of its divisors is an integer number (7493451750).

Almost surely, 2^138889628542 is an apocalyptic number.

138889628542 is a deficient number, since it is larger than the sum of its proper divisors (100900827458).

138889628542 is a wasteful number, since it uses less digits than its factorization.

138889628542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26820.

The product of its digits is 53084160, while the sum is 64.

The spelling of 138889628542 in words is "one hundred thirty-eight billion, eight hundred eighty-nine million, six hundred twenty-eight thousand, five hundred forty-two".