138193831326 has 16 divisors (see below), whose sum is σ = 276520120704. Its totient is φ = 46042534104.

The previous prime is 138193831313. The next prime is 138193831331. The reversal of 138193831326 is 623138391831.

138193831326 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5505520 + ... + 5530563.

It is an arithmetic number, because the mean of its divisors is an integer number (17282507544).

Almost surely, 2^138193831326 is an apocalyptic number.

138193831326 is an abundant number, since it is smaller than the sum of its proper divisors (138326289378).

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

138193831326 is a wasteful number, since it uses less digits than its factorization.

138193831326 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11038175.

The product of its digits is 559872, while the sum is 48.

The spelling of 138193831326 in words is "one hundred thirty-eight billion, one hundred ninety-three million, eight hundred thirty-one thousand, three hundred twenty-six".