138777515139 has 16 divisors (see below), whose sum is σ = 191015459712. Its totient is φ = 89567038848.

The previous prime is 138777515111. The next prime is 138777515141. The reversal of 138777515139 is 931515777831.

It is not a de Polignac number, because 138777515139 - 2⁷ = 138777515011 is a prime.

It is not an unprimeable number, because it can be changed into a prime (138777515189) 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, 4745577 + ... + 4774730.

It is an arithmetic number, because the mean of its divisors is an integer number (11938466232).

Almost surely, 2^138777515139 is an apocalyptic number.

138777515139 is a deficient number, since it is larger than the sum of its proper divisors (52237944573).

138777515139 is a wasteful number, since it uses less digits than its factorization.

138777515139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9520466.

The product of its digits is 5556600, while the sum is 57.

The spelling of 138777515139 in words is "one hundred thirty-eight billion, seven hundred seventy-seven million, five hundred fifteen thousand, one hundred thirty-nine".