138117761913 has 4 divisors (see below), whose sum is σ = 184157015888. Its totient is φ = 92078507940.

The previous prime is 138117761897. The next prime is 138117761921. The reversal of 138117761913 is 319167711831.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 138117761913 - 2⁴ = 138117761897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138117761933) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23019626983 + ... + 23019626988.

It is an arithmetic number, because the mean of its divisors is an integer number (46039253972).

Almost surely, 2^138117761913 is an apocalyptic number.

It is an amenable number.

138117761913 is a deficient number, since it is larger than the sum of its proper divisors (46039253975).

138117761913 is an equidigital number, since it uses as much as digits as its factorization.

138117761913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46039253974.

The product of its digits is 190512, while the sum is 48.

The spelling of 138117761913 in words is "one hundred thirty-eight billion, one hundred seventeen million, seven hundred sixty-one thousand, nine hundred thirteen".