9898169216780 has 288 divisors, whose sum is σ = 23426227528704. Its totient is φ = 3508536425472.

The previous prime is 9898169216777. The next prime is 9898169216809. The reversal of 9898169216780 is 876129618989.

It is a super-2 number, since 2×9898169216780² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (74).

It is a junction number, because it is equal to n+sod(n) for n = 9898169216698 and 9898169216707.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 3954521009 + ... + 3954523511.

It is an arithmetic number, because the mean of its divisors is an integer number (81341067808).

Almost surely, 2^{9898169216780} 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 9898169216780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11713113764352).

9898169216780 is an abundant number, since it is smaller than the sum of its proper divisors (13528058311924).

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

9898169216780 is a wasteful number, since it uses less digits than its factorization.

9898169216780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2985 (or 2970 counting only the distinct ones).

The product of its (nonzero) digits is 188116992, while the sum is 74.

The spelling of 9898169216780 in words is "nine trillion, eight hundred ninety-eight billion, one hundred sixty-nine million, two hundred sixteen thousand, seven hundred eighty".