99891689184 has 192 divisors, whose sum is σ = 334900500480. Its totient is φ = 28375211520.

The previous prime is 99891689173. The next prime is 99891689221. The reversal of 99891689184 is 48198619899.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a nude number because it is divisible by every one of its digits.

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, 998569 + ... + 1094039.

It is an arithmetic number, because the mean of its divisors is an integer number (1744273440).

Almost surely, 2^99891689184 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 99891689184, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (167450250240).

99891689184 is an abundant number, since it is smaller than the sum of its proper divisors (235008811296).

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

99891689184 is a wasteful number, since it uses less digits than its factorization.

99891689184 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95670 (or 95656 counting only the distinct ones).

The product of its digits is 80621568, while the sum is 72.

The spelling of 99891689184 in words is "ninety-nine billion, eight hundred ninety-one million, six hundred eighty-nine thousand, one hundred eighty-four".