138159409168 has 40 divisors (see below), whose sum is σ = 295299894240. Its totient is φ = 62094109440.

The previous prime is 138159409163. The next prime is 138159409183. The reversal of 138159409168 is 861904951831.

It is a happy number.

It is a hoax number, since the sum of its digits (55) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (138159409163) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4394430 + ... + 4425757.

It is an arithmetic number, because the mean of its divisors is an integer number (7382497356).

Almost surely, 2^138159409168 is an apocalyptic number.

It is an amenable number.

138159409168 is an abundant number, since it is smaller than the sum of its proper divisors (157140485072).

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

138159409168 is a wasteful number, since it uses less digits than its factorization.

138159409168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8820295 (or 8820289 counting only the distinct ones).

The product of its (nonzero) digits is 1866240, while the sum is 55.

The spelling of 138159409168 in words is "one hundred thirty-eight billion, one hundred fifty-nine million, four hundred nine thousand, one hundred sixty-eight".