138791381589 has 96 divisors (see below), whose sum is σ = 247751322624. Its totient is φ = 73063710720.

The previous prime is 138791381579. The next prime is 138791381669. The reversal of 138791381589 is 985183197831.

138791381589 is a `hidden beast` number, since 1 + 38 + 7 + 9 + 13 + 8 + 1 + 589 = 666.

It is not a de Polignac number, because 138791381589 - 2⁵ = 138791381557 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138791381569) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 26278629 + ... + 26283909.

It is an arithmetic number, because the mean of its divisors is an integer number (2580742944).

Almost surely, 2^138791381589 is an apocalyptic number.

It is an amenable number.

138791381589 is a deficient number, since it is larger than the sum of its proper divisors (108959941035).

138791381589 is a wasteful number, since it uses less digits than its factorization.

138791381589 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5827 (or 5824 counting only the distinct ones).

The product of its digits is 13063680, while the sum is 63.

The spelling of 138791381589 in words is "one hundred thirty-eight billion, seven hundred ninety-one million, three hundred eighty-one thousand, five hundred eighty-nine".