138711111256 has 32 divisors (see below), whose sum is σ = 273023539200. Its totient is φ = 65980674720.

The previous prime is 138711111247. The next prime is 138711111269. The reversal of 138711111256 is 652111117831.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4725360 + ... + 4754623.

It is an arithmetic number, because the mean of its divisors is an integer number (8531985600).

Almost surely, 2^138711111256 is an apocalyptic number.

It is an amenable number.

138711111256 is a deficient number, since it is larger than the sum of its proper divisors (134312427944).

138711111256 is a wasteful number, since it uses less digits than its factorization.

138711111256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9480079 (or 9480075 counting only the distinct ones).

The product of its digits is 10080, while the sum is 37.

The spelling of 138711111256 in words is "one hundred thirty-eight billion, seven hundred eleven million, one hundred eleven thousand, two hundred fifty-six".