138736636725 has 12 divisors (see below), whose sum is σ = 229377906176. Its totient is φ = 73992872880.

The previous prime is 138736636699. The next prime is 138736636733. The reversal of 138736636725 is 527636637831.

It is not a de Polignac number, because 138736636725 - 2¹⁷ = 138736505653 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 924910837 + ... + 924910986.

Almost surely, 2^138736636725 is an apocalyptic number.

138736636725 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

138736636725 is a deficient number, since it is larger than the sum of its proper divisors (90641269451).

138736636725 is a wasteful number, since it uses less digits than its factorization.

138736636725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1849821836 (or 1849821831 counting only the distinct ones).

The product of its digits is 22861440, while the sum is 57.

The spelling of 138736636725 in words is "one hundred thirty-eight billion, seven hundred thirty-six million, six hundred thirty-six thousand, seven hundred twenty-five".