138875355522 has 80 divisors (see below), whose sum is σ = 327676034400. Its totient is φ = 43840077120.

The previous prime is 138875355497. The next prime is 138875355523. The reversal of 138875355522 is 225553578831.

138875355522 is a `hidden beast` number, since 1 + 3 + 8 + 87 + 5 + 3 + 5 + 552 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (138875355523) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 11594997 + ... + 11606967.

It is an arithmetic number, because the mean of its divisors is an integer number (4095950430).

Almost surely, 2^138875355522 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 138875355522, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (163838017200).

138875355522 is an abundant number, since it is smaller than the sum of its proper divisors (188800678878).

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

138875355522 is a wasteful number, since it uses less digits than its factorization.

138875355522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15773 (or 15764 counting only the distinct ones).

The product of its digits is 10080000, while the sum is 54.

The spelling of 138875355522 in words is "one hundred thirty-eight billion, eight hundred seventy-five million, three hundred fifty-five thousand, five hundred twenty-two".