9998199998 has 32 divisors (see below), whose sum is σ = 15450082560. Its totient is φ = 4850818560.

The previous prime is 9998199943. The next prime is 9998200013. The reversal of 9998199998 is 8999918999.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3155411 + ... + 3158577.

It is an arithmetic number, because the mean of its divisors is an integer number (482815080).

Almost surely, 2^9998199998 is an apocalyptic number.

9998199998 is a deficient number, since it is larger than the sum of its proper divisors (5451882562).

9998199998 is a wasteful number, since it uses less digits than its factorization.

9998199998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3572.

The product of its digits is 306110016, while the sum is 80.

The square root of 9998199998 is about 99990.9995849626. Note that the first 3 decimals coincide. The cubic root of 9998199998 is about 2154.3054160501.

The spelling of 9998199998 in words is "nine billion, nine hundred ninety-eight million, one hundred ninety-nine thousand, nine hundred ninety-eight".