138326988789 has 64 divisors (see below), whose sum is σ = 235844352000. Its totient is φ = 79246926720.

The previous prime is 138326988773. The next prime is 138326988809. The reversal of 138326988789 is 987889623831.

138326988789 is a `hidden beast` number, since 1 + 383 + 2 + 6 + 98 + 87 + 89 = 666.

It is not a de Polignac number, because 138326988789 - 2⁴ = 138326988773 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138326988749) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2552032 + ... + 2605670.

It is an arithmetic number, because the mean of its divisors is an integer number (3685068000).

Almost surely, 2^138326988789 is an apocalyptic number.

138326988789 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

138326988789 is a deficient number, since it is larger than the sum of its proper divisors (97517363211).

138326988789 is a wasteful number, since it uses less digits than its factorization.

138326988789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54135 (or 54129 counting only the distinct ones).

The product of its digits is 250822656, while the sum is 72.

The spelling of 138326988789 in words is "one hundred thirty-eight billion, three hundred twenty-six million, nine hundred eighty-eight thousand, seven hundred eighty-nine".