138878952336 has 60 divisors (see below), whose sum is σ = 409124407120. Its totient is φ = 43856510400.

The previous prime is 138878952319. The next prime is 138878952341. The reversal of 138878952336 is 633259878831.

138878952336 is a `hidden beast` number, since 1 + 3 + 8 + 8 + 78 + 9 + 523 + 36 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25377190 + ... + 25382661.

Almost surely, 2^138878952336 is an apocalyptic number.

138878952336 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

138878952336 is an abundant number, since it is smaller than the sum of its proper divisors (270245454784).

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

138878952336 is a wasteful number, since it uses less digits than its factorization.

138878952336 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50759884 (or 50759875 counting only the distinct ones).

The product of its digits is 52254720, while the sum is 63.

The spelling of 138878952336 in words is "one hundred thirty-eight billion, eight hundred seventy-eight million, nine hundred fifty-two thousand, three hundred thirty-six".