138185708138772 has 36 divisors (see below), whose sum is σ = 375075493521120. Its totient is φ = 39481630896624.

The previous prime is 138185708138741. The next prime is 138185708138773. The reversal of 138185708138772 is 277831807581831.

It is a junction number, because it is equal to n+sod(n) for n = 138185708138697 and 138185708138706.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138185708138773) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 117504853272 + ... + 117504854447.

It is an arithmetic number, because the mean of its divisors is an integer number (10418763708920).

Almost surely, 2^{138185708138772} is an apocalyptic number.

138185708138772 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

138185708138772 is an abundant number, since it is smaller than the sum of its proper divisors (236889785382348).

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

138185708138772 is a wasteful number, since it uses less digits than its factorization.

138185708138772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 235009707740 (or 235009707731 counting only the distinct ones).

The product of its (nonzero) digits is 126443520, while the sum is 69.

The spelling of 138185708138772 in words is "one hundred thirty-eight trillion, one hundred eighty-five billion, seven hundred eight million, one hundred thirty-eight thousand, seven hundred seventy-two".