138117829113987 has 64 divisors (see below), whose sum is σ = 188606782457856. Its totient is φ = 89884948285440.

The previous prime is 138117829113961. The next prime is 138117829113989. The reversal of 138117829113987 is 789311928711831.

It is not a de Polignac number, because 138117829113987 - 2⁶ = 138117829113923 is a prime.

It is a super-2 number, since 2×138117829113987² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (138117829113989) 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, 29443150312 + ... + 29443155002.

It is an arithmetic number, because the mean of its divisors is an integer number (2946980975904).

Almost surely, 2^{138117829113987} is an apocalyptic number.

138117829113987 is a deficient number, since it is larger than the sum of its proper divisors (50488953343869).

138117829113987 is a wasteful number, since it uses less digits than its factorization.

138117829113987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7520.

The product of its digits is 36578304, while the sum is 69.

The spelling of 138117829113987 in words is "one hundred thirty-eight trillion, one hundred seventeen billion, eight hundred twenty-nine million, one hundred thirteen thousand, nine hundred eighty-seven".