138979536350 has 24 divisors (see below), whose sum is σ = 266840712768. Its totient is φ = 53798529600.

The previous prime is 138979536221. The next prime is 138979536457. The reversal of 138979536350 is 53635979831.

It is a Smith number, since the sum of its digits (59) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 138979536350.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 44830559 + ... + 44833658.

It is an arithmetic number, because the mean of its divisors is an integer number (11118363032).

Almost surely, 2^138979536350 is an apocalyptic number.

138979536350 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138979536350 is a deficient number, since it is larger than the sum of its proper divisors (127861176418).

138979536350 is a wasteful number, since it uses less digits than its factorization.

138979536350 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89664260 (or 89664255 counting only the distinct ones).

The product of its (nonzero) digits is 18370800, while the sum is 59.

The spelling of 138979536350 in words is "one hundred thirty-eight billion, nine hundred seventy-nine million, five hundred thirty-six thousand, three hundred fifty".