99801321984 has 720 divisors, whose sum is σ = 368445709632. Its totient is φ = 25323798528.

The previous prime is 99801321947. The next prime is 99801322009. The reversal of 99801321984 is 48912310899.

It is a self number, because there is not a number n which added to its sum of digits gives 99801321984.

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 71 ways as a sum of consecutive naturals, for example, 352654707 + ... + 352654989.

Almost surely, 2^99801321984 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 99801321984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (184222854816).

99801321984 is an abundant number, since it is smaller than the sum of its proper divisors (268644387648).

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

99801321984 is a wasteful number, since it uses less digits than its factorization.

99801321984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 385 (or 337 counting only the distinct ones).

The product of its (nonzero) digits is 1119744, while the sum is 54.

The spelling of 99801321984 in words is "ninety-nine billion, eight hundred one million, three hundred twenty-one thousand, nine hundred eighty-four".