138981104889 has 16 divisors (see below), whose sum is σ = 202254064320. Its totient is φ = 84189418560.

The previous prime is 138981104863. The next prime is 138981104929. The reversal of 138981104889 is 988401189831.

It is a happy number.

It is not a de Polignac number, because 138981104889 - 2⁷ = 138981104761 is a prime.

It is not an unprimeable number, because it can be changed into a prime (138981104809) 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, 970882 + ... + 1104795.

It is an arithmetic number, because the mean of its divisors is an integer number (12640879020).

Almost surely, 2^138981104889 is an apocalyptic number.

It is an amenable number.

138981104889 is a deficient number, since it is larger than the sum of its proper divisors (63272959431).

138981104889 is a wasteful number, since it uses less digits than its factorization.

138981104889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2077720.

The product of its (nonzero) digits is 3981312, while the sum is 60.

The spelling of 138981104889 in words is "one hundred thirty-eight billion, nine hundred eighty-one million, one hundred four thousand, eight hundred eighty-nine".