9999000009998 has 8 divisors (see below), whose sum is σ = 15001400533320. Its totient is φ = 4998533165560.

The previous prime is 9999000009967. The next prime is 9999000010067. The reversal of 9999000009998 is 8999000009999.

9999000009998 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 483406793 + ... + 483427476.

It is an arithmetic number, because the mean of its divisors is an integer number (1875175066665).

Almost surely, 2^{9999000009998} is an apocalyptic number.

9999000009998 is a deficient number, since it is larger than the sum of its proper divisors (5002400523322).

9999000009998 is a wasteful number, since it uses less digits than its factorization.

9999000009998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 966839442.

The product of its (nonzero) digits is 38263752, while the sum is 71.

Subtracting from 9999000009998 its reverse (8999000009999), we obtain a palindrome (999999999999).

The spelling of 9999000009998 in words is "nine trillion, nine hundred ninety-nine billion, nine thousand, nine hundred ninety-eight".