138351616120 has 64 divisors (see below), whose sum is σ = 333774691200. Its totient is φ = 51425986560.

The previous prime is 138351616063. The next prime is 138351616147. The reversal of 138351616120 is 21616153831.

It is a self number, because there is not a number n which added to its sum of digits gives 138351616120.

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, 1233991 + ... + 1341430.

It is an arithmetic number, because the mean of its divisors is an integer number (5215229550).

Almost surely, 2^138351616120 is an apocalyptic number.

138351616120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

138351616120 is an abundant number, since it is smaller than the sum of its proper divisors (195423075080).

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

138351616120 is a wasteful number, since it uses less digits than its factorization.

138351616120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2575528 (or 2575524 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 37.

Adding to 138351616120 its reverse (21616153831), we get a palindrome (159967769951).

The spelling of 138351616120 in words is "one hundred thirty-eight billion, three hundred fifty-one million, six hundred sixteen thousand, one hundred twenty".