138816856432 has 40 divisors (see below), whose sum is σ = 272827930752. Its totient is φ = 68410238400.

The previous prime is 138816856417. The next prime is 138816856433. The reversal of 138816856432 is 234658618831.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138816856433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4176423 + ... + 4209529.

Almost surely, 2^138816856432 is an apocalyptic number.

It is an amenable number.

138816856432 is a deficient number, since it is larger than the sum of its proper divisors (134011074320).

138816856432 is a wasteful number, since it uses less digits than its factorization.

138816856432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36877 (or 36871 counting only the distinct ones).

The product of its digits is 6635520, while the sum is 55.

The spelling of 138816856432 in words is "one hundred thirty-eight billion, eight hundred sixteen million, eight hundred fifty-six thousand, four hundred thirty-two".