138699996831 has 48 divisors (see below), whose sum is σ = 237668434848. Its totient is φ = 76977561600.

The previous prime is 138699996823. The next prime is 138699996847.

138699996831 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 138699996831 - 2³ = 138699996823 is a prime.

It is a super-2 number, since 2×138699996831² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 138699996831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138699996821) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1051410 + ... + 1175951.

It is an arithmetic number, because the mean of its divisors is an integer number (4951425726).

Almost surely, 2^138699996831 is an apocalyptic number.

138699996831 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

138699996831 is a deficient number, since it is larger than the sum of its proper divisors (98968438017).

138699996831 is a wasteful number, since it uses less digits than its factorization.

138699996831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2227432 (or 2227429 counting only the distinct ones).

The product of its digits is 136048896, while the sum is 72.

The spelling of 138699996831 in words is "one hundred thirty-eight billion, six hundred ninety-nine million, nine hundred ninety-six thousand, eight hundred thirty-one".