138831313875 has 32 divisors (see below), whose sum is σ = 244604453184. Its totient is φ = 69687872000.

The previous prime is 138831313853. The next prime is 138831313877. The reversal of 138831313875 is 578313138831.

It is not a de Polignac number, because 138831313875 - 2²⁴ = 138814536659 is a prime.

It is a hoax number, since the sum of its digits (51) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is not an unprimeable number, because it can be changed into a prime (138831313877) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10882356 + ... + 10895105.

It is an arithmetic number, because the mean of its divisors is an integer number (7643889162).

Almost surely, 2^138831313875 is an apocalyptic number.

138831313875 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

138831313875 is a deficient number, since it is larger than the sum of its proper divisors (105773139309).

138831313875 is a wasteful number, since it uses less digits than its factorization.

138831313875 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21777496 (or 21777486 counting only the distinct ones).

The product of its digits is 1451520, while the sum is 51.

The spelling of 138831313875 in words is "one hundred thirty-eight billion, eight hundred thirty-one million, three hundred thirteen thousand, eight hundred seventy-five".