138813818825 has 12 divisors (see below), whose sum is σ = 187777238928. Its totient is φ = 100955504400.

The previous prime is 138813818789. The next prime is 138813818833. The reversal of 138813818825 is 528818318831.

It is not a de Polignac number, because 138813818825 - 2¹⁰ = 138813817801 is a prime.

It is a Duffinian 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, 252388487 + ... + 252389036.

It is an arithmetic number, because the mean of its divisors is an integer number (15648103244).

Almost surely, 2^138813818825 is an apocalyptic number.

It is an amenable number.

138813818825 is a deficient number, since it is larger than the sum of its proper divisors (48963420103).

138813818825 is a wasteful number, since it uses less digits than its factorization.

138813818825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 504777544 (or 504777539 counting only the distinct ones).

The product of its digits is 2949120, while the sum is 56.

The spelling of 138813818825 in words is "one hundred thirty-eight billion, eight hundred thirteen million, eight hundred eighteen thousand, eight hundred twenty-five".