138625689385 has 64 divisors (see below), whose sum is σ = 181878359040. Its totient is φ = 101088000000.

The previous prime is 138625689383. The next prime is 138625689403. The reversal of 138625689385 is 583986526831.

It is not a de Polignac number, because 138625689385 - 2¹ = 138625689383 is a prime.

It is not an unprimeable number, because it can be changed into a prime (138625689383) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 184587760 + ... + 184588510.

It is an arithmetic number, because the mean of its divisors is an integer number (2841849360).

Almost surely, 2^138625689385 is an apocalyptic number.

It is an amenable number.

138625689385 is a deficient number, since it is larger than the sum of its proper divisors (43252669655).

138625689385 is a wasteful number, since it uses less digits than its factorization.

138625689385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1490.

The product of its digits is 74649600, while the sum is 64.

The spelling of 138625689385 in words is "one hundred thirty-eight billion, six hundred twenty-five million, six hundred eighty-nine thousand, three hundred eighty-five".