9988118798 has 16 divisors (see below), whose sum is σ = 17182999680. Its totient is φ = 4265494776.

The previous prime is 9988118779. The next prime is 9988118813. The reversal of 9988118798 is 8978118899.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1256528 + ... + 1264451.

It is an arithmetic number, because the mean of its divisors is an integer number (1073937480).

Almost surely, 2^9988118798 is an apocalyptic number.

9988118798 is a deficient number, since it is larger than the sum of its proper divisors (7194880882).

9988118798 is a wasteful number, since it uses less digits than its factorization.

9988118798 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2521271.

The product of its digits is 20901888, while the sum is 68.

The square root of 9988118798 is about 99940.5763341397. The cubic root of 9988118798 is about 2153.5811094322.

The spelling of 9988118798 in words is "nine billion, nine hundred eighty-eight million, one hundred eighteen thousand, seven hundred ninety-eight".