138188887625 has 8 divisors (see below), whose sum is σ = 172459731912. Its totient is φ = 110551110000.

The previous prime is 138188887567. The next prime is 138188887663. The reversal of 138188887625 is 526788881831.

It can be written as a sum of positive squares in 4 ways, for example, as 22677950464 + 115510937161 = 150592^2 + 339869^2 .

It is not a de Polignac number, because 138188887625 - 2⁶ = 138188887561 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 552755426 + ... + 552755675.

It is an arithmetic number, because the mean of its divisors is an integer number (21557466489).

Almost surely, 2^138188887625 is an apocalyptic number.

It is an amenable number.

138188887625 is a deficient number, since it is larger than the sum of its proper divisors (34270844287).

138188887625 is an equidigital number, since it uses as much as digits as its factorization.

138188887625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1105511116 (or 1105511106 counting only the distinct ones).

The product of its digits is 41287680, while the sum is 65.

The spelling of 138188887625 in words is "one hundred thirty-eight billion, one hundred eighty-eight million, eight hundred eighty-seven thousand, six hundred twenty-five".