9998811188999 has 2 divisors, whose sum is σ = 9998811189000. Its totient is φ = 9998811188998.

The previous prime is 9998811188923. The next prime is 9998811189001.

9998811188999 is nontrivially palindromic in base 10.

It is a strong prime.

It is a palprime.

It is a cyclic number.

It is not a de Polignac number, because 9998811188999 - 2¹² = 9998811184903 is a prime.

Together with 9998811189001, it forms a pair of twin primes.

It is a Chen prime.

It is a zygodrome in base 10.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9998814188999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4999405594499 + 4999405594500.

It is an arithmetic number, because the mean of its divisors is an integer number (4999405594500).

Almost surely, 2^{9998811188999} is an apocalyptic number.

9998811188999 is a deficient number, since it is larger than the sum of its proper divisors (1).

9998811188999 is an equidigital number, since it uses as much as digits as its factorization.

9998811188999 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2176782336, while the sum is 89.

The spelling of 9998811188999 in words is "nine trillion, nine hundred ninety-eight billion, eight hundred eleven million, one hundred eighty-eight thousand, nine hundred ninety-nine".