99999989999984 has 80 divisors (see below), whose sum is σ = 199145574153216. Its totient is φ = 48609760953600.

The previous prime is 99999989999983. The next prime is 99999990000107. The reversal of 99999989999984 is 48999998999999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99999989999983) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4486103879 + ... + 4486126169.

Almost surely, 2^{99999989999984} is an apocalyptic number.

It is an amenable number.

99999989999984 is a deficient number, since it is larger than the sum of its proper divisors (99145584153232).

99999989999984 is a wasteful number, since it uses less digits than its factorization.

99999989999984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28054 (or 28048 counting only the distinct ones).

The product of its digits is 8033551259904, while the sum is 119.

The spelling of 99999989999984 in words is "ninety-nine trillion, nine hundred ninety-nine billion, nine hundred eighty-nine million, nine hundred ninety-nine thousand, nine hundred eighty-four".