138309589998 has 24 divisors (see below), whose sum is σ = 306046754208. Its totient is φ = 45122277312.

The previous prime is 138309589991. The next prime is 138309590039. The reversal of 138309589998 is 899985903831.

138309589998 is a `hidden beast` number, since 1 + 3 + 8 + 30 + 9 + 589 + 9 + 9 + 8 = 666.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138309589991) 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, 81742411 + ... + 81744102.

It is an arithmetic number, because the mean of its divisors is an integer number (12751948092).

Almost surely, 2^138309589998 is an apocalyptic number.

138309589998 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

138309589998 is an abundant number, since it is smaller than the sum of its proper divisors (167737164210).

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

138309589998 is a wasteful number, since it uses less digits than its factorization.

138309589998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163486568 (or 163486565 counting only the distinct ones).

The product of its (nonzero) digits is 151165440, while the sum is 72.

The spelling of 138309589998 in words is "one hundred thirty-eight billion, three hundred nine million, five hundred eighty-nine thousand, nine hundred ninety-eight".