99634936128 has 224 divisors, whose sum is σ = 326404614144. Its totient is φ = 26119231488.

The previous prime is 99634936123. The next prime is 99634936139. The reversal of 99634936128 is 82163943699.

It is a tau number, because it is divible by the number of its divisors (224).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99634936123) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 2900751 + ... + 2934897.

It is an arithmetic number, because the mean of its divisors is an integer number (1457163456).

Almost surely, 2^99634936128 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 99634936128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (163202307072).

99634936128 is an abundant number, since it is smaller than the sum of its proper divisors (226769678016).

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

99634936128 is a wasteful number, since it uses less digits than its factorization.

99634936128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34349 (or 34339 counting only the distinct ones).

The product of its digits is 15116544, while the sum is 60.

The spelling of 99634936128 in words is "ninety-nine billion, six hundred thirty-four million, nine hundred thirty-six thousand, one hundred twenty-eight".