138656632404 has 24 divisors (see below), whose sum is σ = 323540185248. Its totient is φ = 46217728480.

The previous prime is 138656632397. The next prime is 138656632447. The reversal of 138656632404 is 404236656831.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 461014 + ... + 699890.

It is an arithmetic number, because the mean of its divisors is an integer number (13480841052).

Almost surely, 2^138656632404 is an apocalyptic number.

It is an amenable number.

138656632404 is an abundant number, since it is smaller than the sum of its proper divisors (184883552844).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

138656632404 is a wasteful number, since it uses less digits than its factorization.

138656632404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 287255 (or 287253 counting only the distinct ones).

The product of its (nonzero) digits is 2488320, while the sum is 48.

The spelling of 138656632404 in words is "one hundred thirty-eight billion, six hundred fifty-six million, six hundred thirty-two thousand, four hundred four".