99789053255424 has 576 divisors, whose sum is σ = 335662658150400. Its totient is φ = 28988884205568.

The previous prime is 99789053255351. The next prime is 99789053255461. The reversal of 99789053255424 is 42455235098799.

99789053255424 is a `hidden beast` number, since 9 + 9 + 7 + 8 + 9 + 0 + 53 + 25 + 542 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (576).

It is a super-2 number, since 2×99789053255424² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 500128609 + ... + 500328095.

It is an arithmetic number, because the mean of its divisors is an integer number (582747670400).

Almost surely, 2^{99789053255424} 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 99789053255424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (167831329075200).

99789053255424 is an abundant number, since it is smaller than the sum of its proper divisors (235873604894976).

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

99789053255424 is a wasteful number, since it uses less digits than its factorization.

99789053255424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199837 (or 199817 counting only the distinct ones).

The product of its (nonzero) digits is 979776000, while the sum is 72.

The spelling of 99789053255424 in words is "ninety-nine trillion, seven hundred eighty-nine billion, fifty-three million, two hundred fifty-five thousand, four hundred twenty-four".