138637789884 has 144 divisors (see below), whose sum is σ = 386236861920. Its totient is φ = 41581509120.

The previous prime is 138637789883. The next prime is 138637789897. The reversal of 138637789884 is 488987736831.

138637789884 is a `hidden beast` number, since 13 + 86 + 377 + 8 + 98 + 84 = 666.

138637789884 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138637789883) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 15683914 + ... + 15692750.

It is an arithmetic number, because the mean of its divisors is an integer number (2682200430).

Almost surely, 2^138637789884 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 138637789884, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (193118430960).

138637789884 is an abundant number, since it is smaller than the sum of its proper divisors (247599072036).

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

138637789884 is a wasteful number, since it uses less digits than its factorization.

138637789884 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9260 (or 9255 counting only the distinct ones).

The product of its digits is 390168576, while the sum is 72.

The spelling of 138637789884 in words is "one hundred thirty-eight billion, six hundred thirty-seven million, seven hundred eighty-nine thousand, eight hundred eighty-four".