138389818060 has 48 divisors (see below), whose sum is σ = 313003143936. Its totient is φ = 51093004032.

The previous prime is 138389818031. The next prime is 138389818069. The reversal of 138389818060 is 60818983831.

It is a Smith number, since the sum of its digits (55) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 138389817992 and 138389818010.

It is not an unprimeable number, because it can be changed into a prime (138389818069) 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, 4034502 + ... + 4068658.

It is an arithmetic number, because the mean of its divisors is an integer number (6520898832).

Almost surely, 2^138389818060 is an apocalyptic number.

138389818060 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

138389818060 is an abundant number, since it is smaller than the sum of its proper divisors (174613325876).

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

138389818060 is a wasteful number, since it uses less digits than its factorization.

138389818060 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49762 (or 49760 counting only the distinct ones).

The product of its (nonzero) digits is 1990656, while the sum is 55.

The spelling of 138389818060 in words is "one hundred thirty-eight billion, three hundred eighty-nine million, eight hundred eighteen thousand, sixty".