9999928647198 has 256 divisors, whose sum is σ = 27766890823680. Its totient is φ = 2601479462400.

The previous prime is 9999928647161. The next prime is 9999928647211. The reversal of 9999928647198 is 8917468299999.

9999928647198 is a `hidden beast` number, since 9 + 99 + 99 + 286 + 4 + 71 + 98 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 845225143 + ... + 845236973.

It is an arithmetic number, because the mean of its divisors is an integer number (108464417280).

Almost surely, 2^{9999928647198} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9999928647198, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13883445411840).

9999928647198 is an abundant number, since it is smaller than the sum of its proper divisors (17766962176482).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

9999928647198 is a wasteful number, since it uses less digits than its factorization.

9999928647198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16140 (or 16134 counting only the distinct ones).

The product of its digits is 11428107264, while the sum is 90.

The spelling of 9999928647198 in words is "nine trillion, nine hundred ninety-nine billion, nine hundred twenty-eight million, six hundred forty-seven thousand, one hundred ninety-eight".