99639124854 has 64 divisors (see below), whose sum is σ = 211438080000. Its totient is φ = 31214829600.

The previous prime is 99639124831. The next prime is 99639124867. The reversal of 99639124854 is 45842193699.

99639124854 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14439097 + ... + 14445995.

It is an arithmetic number, because the mean of its divisors is an integer number (3303720000).

Almost surely, 2^99639124854 is an apocalyptic number.

99639124854 is an abundant number, since it is smaller than the sum of its proper divisors (111798955146).

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

99639124854 is a wasteful number, since it uses less digits than its factorization.

99639124854 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7913.

The product of its digits is 16796160, while the sum is 60.

The spelling of 99639124854 in words is "ninety-nine billion, six hundred thirty-nine million, one hundred twenty-four thousand, eight hundred fifty-four".