138817870794 has 48 divisors (see below), whose sum is σ = 328328189280. Its totient is φ = 43837219440.

The previous prime is 138817870787. The next prime is 138817870817. The reversal of 138817870794 is 497078718831.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7507437 + ... + 7525904.

It is an arithmetic number, because the mean of its divisors is an integer number (6840170610).

Almost surely, 2^138817870794 is an apocalyptic number.

138817870794 is an abundant number, since it is smaller than the sum of its proper divisors (189510318486).

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

138817870794 is a wasteful number, since it uses less digits than its factorization.

138817870794 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15033377 (or 15033365 counting only the distinct ones).

The product of its (nonzero) digits is 18966528, while the sum is 63.

The spelling of 138817870794 in words is "one hundred thirty-eight billion, eight hundred seventeen million, eight hundred seventy thousand, seven hundred ninety-four".