138173244120 has 80 divisors (see below), whose sum is σ = 464415636960. Its totient is φ = 36846197568.

The previous prime is 138173244047. The next prime is 138173244149. The reversal of 138173244120 is 21442371831.

It is a super-2 number, since 2×138173244120² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 21319792 + ... + 21326271.

It is an arithmetic number, because the mean of its divisors is an integer number (5805195462).

Almost surely, 2^138173244120 is an apocalyptic number.

138173244120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

138173244120 is an abundant number, since it is smaller than the sum of its proper divisors (326242392840).

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

138173244120 is a wasteful number, since it uses less digits than its factorization.

138173244120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42646086 (or 42646073 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The spelling of 138173244120 in words is "one hundred thirty-eight billion, one hundred seventy-three million, two hundred forty-four thousand, one hundred twenty".