9998787825600 has 2016 divisors, whose sum is σ = 40342777896960. Its totient is φ = 2159583068160.

The previous prime is 9998787825583. The next prime is 9998787825601. The reversal of 9998787825600 is 65287878999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9998787825601) by changing a digit.

It is a polite number, since it can be written in 287 ways as a sum of consecutive naturals, for example, 78730612737 + ... + 78730612863.

It is an arithmetic number, because the mean of its divisors is an integer number (20011298560).

Almost surely, 2^{9998787825600} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9998787825600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20171388948480).

9998787825600 is an abundant number, since it is smaller than the sum of its proper divisors (30343990071360).

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

9998787825600 is a wasteful number, since it uses less digits than its factorization.

9998787825600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 395 (or 373 counting only the distinct ones).

The product of its (nonzero) digits is 1097349120, while the sum is 78.

The spelling of 9998787825600 in words is "nine trillion, nine hundred ninety-eight billion, seven hundred eighty-seven million, eight hundred twenty-five thousand, six hundred".