9998481545856 has 192 divisors, whose sum is σ = 29886501415680. Its totient is φ = 3327330244608.

The previous prime is 9998481545711. The next prime is 9998481545861. The reversal of 9998481545856 is 6585451848999.

9998481545856 is a `hidden beast` number, since 9 + 9 + 9 + 8 + 481 + 54 + 5 + 85 + 6 = 666.

9998481545856 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (192).

It is a Harshad number since it is a multiple of its sum of digits (81).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18615340 + ... + 19144916.

It is an arithmetic number, because the mean of its divisors is an integer number (155658861540).

Almost surely, 2^{9998481545856} is an apocalyptic number.

9998481545856 is a gapful number since it is divisible by the number (96) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9998481545856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14943250707840).

9998481545856 is an abundant number, since it is smaller than the sum of its proper divisors (19888019869824).

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

9998481545856 is an equidigital number, since it uses as much as digits as its factorization.

9998481545856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 530213 (or 530189 counting only the distinct ones).

The product of its digits is 4478976000, while the sum is 81.

The spelling of 9998481545856 in words is "nine trillion, nine hundred ninety-eight billion, four hundred eighty-one million, five hundred forty-five thousand, eight hundred fifty-six".