138367939227 has 16 divisors (see below), whose sum is σ = 210853999872. Its totient is φ = 79064537760.

The previous prime is 138367939219. The next prime is 138367939243. The reversal of 138367939227 is 722939763831.

It is not a de Polignac number, because 138367939227 - 2³ = 138367939219 is a prime.

It is not an unprimeable number, because it can be changed into a prime (138367939207) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 568588 + ... + 774614.

It is an arithmetic number, because the mean of its divisors is an integer number (13178374992).

Almost surely, 2^138367939227 is an apocalyptic number.

138367939227 is a deficient number, since it is larger than the sum of its proper divisors (72486060645).

138367939227 is a wasteful number, since it uses less digits than its factorization.

138367939227 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238018.

The product of its digits is 20575296, while the sum is 60.

The spelling of 138367939227 in words is "one hundred thirty-eight billion, three hundred sixty-seven million, nine hundred thirty-nine thousand, two hundred twenty-seven".