138865207229 has 12 divisors (see below), whose sum is σ = 162504375264. Its totient is φ = 118314575064.

The previous prime is 138865207181. The next prime is 138865207237. The reversal of 138865207229 is 922702568831.

It is not a de Polignac number, because 138865207229 - 2²⁸ = 138596771773 is a prime.

It is a super-2 number, since 2×138865207229² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138865207729) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8476799 + ... + 8493164.

It is an arithmetic number, because the mean of its divisors is an integer number (13542031272).

Almost surely, 2^138865207229 is an apocalyptic number.

It is an amenable number.

138865207229 is a deficient number, since it is larger than the sum of its proper divisors (23639168035).

138865207229 is a wasteful number, since it uses less digits than its factorization.

138865207229 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16970144 (or 16970137 counting only the distinct ones).

The product of its (nonzero) digits is 2903040, while the sum is 53.

The spelling of 138865207229 in words is "one hundred thirty-eight billion, eight hundred sixty-five million, two hundred seven thousand, two hundred twenty-nine".