138372605644 has 24 divisors (see below), whose sum is σ = 298033305248. Its totient is φ = 54740810880.

The previous prime is 138372605627. The next prime is 138372605653. The reversal of 138372605644 is 446506273831.

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, 190071897 + ... + 190072624.

Almost surely, 2^138372605644 is an apocalyptic number.

138372605644 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

138372605644 is an abundant number, since it is smaller than the sum of its proper divisors (159660699604).

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

138372605644 is a wasteful number, since it uses less digits than its factorization.

138372605644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 380144545 (or 380144543 counting only the distinct ones).

The product of its (nonzero) digits is 2903040, while the sum is 49.

The spelling of 138372605644 in words is "one hundred thirty-eight billion, three hundred seventy-two million, six hundred five thousand, six hundred forty-four".