138655808139 has 16 divisors (see below), whose sum is σ = 189458559360. Its totient is φ = 90146917440.

The previous prime is 138655808129. The next prime is 138655808141. The reversal of 138655808139 is 931808556831.

It is a happy number.

It is not a de Polignac number, because 138655808139 - 2⁸ = 138655807883 is a prime.

It is not an unprimeable number, because it can be changed into a prime (138655808129) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 90304 + ... + 534290.

It is an arithmetic number, because the mean of its divisors is an integer number (11841159960).

Almost surely, 2^138655808139 is an apocalyptic number.

138655808139 is a deficient number, since it is larger than the sum of its proper divisors (50802751221).

138655808139 is a wasteful number, since it uses less digits than its factorization.

138655808139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 446570.

The product of its (nonzero) digits is 6220800, while the sum is 57.

The spelling of 138655808139 in words is "one hundred thirty-eight billion, six hundred fifty-five million, eight hundred eight thousand, one hundred thirty-nine".