99999199898 has 24 divisors (see below), whose sum is σ = 162451214748. Its totient is φ = 46145953152.

The previous prime is 99999199843. The next prime is 99999199913. The reversal of 99999199898 is 89899199999.

It can be written as a sum of positive squares in 6 ways, for example, as 42693064129 + 57306135769 = 206623^2 + 239387^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2417486 + ... + 2458502.

Almost surely, 2^99999199898 is an apocalyptic number.

99999199898 is a deficient number, since it is larger than the sum of its proper divisors (62452014850).

99999199898 is a wasteful number, since it uses less digits than its factorization.

99999199898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48258 (or 48245 counting only the distinct ones).

The product of its digits is 2754990144, while the sum is 89.

The spelling of 99999199898 in words is "ninety-nine billion, nine hundred ninety-nine million, one hundred ninety-nine thousand, eight hundred ninety-eight".