99878979008875 has 16 divisors (see below), whose sum is σ = 135980689968864. Its totient is φ = 72639257460000.

The previous prime is 99878979008869. The next prime is 99878979008917. The reversal of 99878979008875 is 57880097987899.

It is not a de Polignac number, because 99878979008875 - 2²⁹ = 99878442137963 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36319627356 + ... + 36319630105.

It is an arithmetic number, because the mean of its divisors is an integer number (8498793123054).

Almost surely, 2^{99878979008875} is an apocalyptic number.

99878979008875 is a deficient number, since it is larger than the sum of its proper divisors (36101710959989).

99878979008875 is a wasteful number, since it uses less digits than its factorization.

99878979008875 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72639257487 (or 72639257477 counting only the distinct ones).

The product of its (nonzero) digits is 46088663040, while the sum is 94.

The spelling of 99878979008875 in words is "ninety-nine trillion, eight hundred seventy-eight billion, nine hundred seventy-nine million, eight thousand, eight hundred seventy-five".