138689170156 has 12 divisors (see below), whose sum is σ = 243765901120. Its totient is φ = 69041769840.

The previous prime is 138689170127. The next prime is 138689170163. The reversal of 138689170156 is 651071986831.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 138689170097 and 138689170106.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 75702780 + ... + 75704611.

Almost surely, 2^138689170156 is an apocalyptic number.

It is an amenable number.

138689170156 is a deficient number, since it is larger than the sum of its proper divisors (105076730964).

138689170156 is a wasteful number, since it uses less digits than its factorization.

138689170156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151407624 (or 151407622 counting only the distinct ones).

The product of its (nonzero) digits is 2177280, while the sum is 55.

The spelling of 138689170156 in words is "one hundred thirty-eight billion, six hundred eighty-nine million, one hundred seventy thousand, one hundred fifty-six".