138207728180 has 48 divisors (see below), whose sum is σ = 305977512960. Its totient is φ = 52334312448.

The previous prime is 138207728179. The next prime is 138207728231. The reversal of 138207728180 is 81827702831.

It is a super-2 number, since 2×138207728180² (a number of 23 digits) contains 22 as substring.

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, 1504100 + ... + 1593339.

It is an arithmetic number, because the mean of its divisors is an integer number (6374531520).

Almost surely, 2^138207728180 is an apocalyptic number.

138207728180 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

138207728180 is an abundant number, since it is smaller than the sum of its proper divisors (167769784780).

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

138207728180 is a wasteful number, since it uses less digits than its factorization.

138207728180 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3097568 (or 3097566 counting only the distinct ones).

The product of its (nonzero) digits is 301056, while the sum is 47.

The spelling of 138207728180 in words is "one hundred thirty-eight billion, two hundred seven million, seven hundred twenty-eight thousand, one hundred eighty".