99381173898 has 32 divisors (see below), whose sum is σ = 201406637952. Its totient is φ = 32688633600.

The previous prime is 99381173887. The next prime is 99381173921. The reversal of 99381173898 is 89837118399.

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, 112483 + ... + 459798.

It is an arithmetic number, because the mean of its divisors is an integer number (6293957436).

Almost surely, 2^99381173898 is an apocalyptic number.

99381173898 is an abundant number, since it is smaller than the sum of its proper divisors (102025464054).

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

99381173898 is a wasteful number, since it uses less digits than its factorization.

99381173898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 572670.

The product of its digits is 23514624, while the sum is 66.

The spelling of 99381173898 in words is "ninety-nine billion, three hundred eighty-one million, one hundred seventy-three thousand, eight hundred ninety-eight".