138551736720 has 160 divisors (see below), whose sum is σ = 455491596672. Its totient is φ = 34719031296.

The previous prime is 138551736649. The next prime is 138551736731. The reversal of 138551736720 is 27637155831.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 138551736720.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2597034 + ... + 2649846.

Almost surely, 2^138551736720 is an apocalyptic number.

138551736720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 138551736720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (227745798336).

138551736720 is an abundant number, since it is smaller than the sum of its proper divisors (316939859952).

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

138551736720 is a wasteful number, since it uses less digits than its factorization.

138551736720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53489 (or 53483 counting only the distinct ones).

The product of its (nonzero) digits is 1058400, while the sum is 48.

The spelling of 138551736720 in words is "one hundred thirty-eight billion, five hundred fifty-one million, seven hundred thirty-six thousand, seven hundred twenty".