99128107728 has 120 divisors (see below), whose sum is σ = 299665577120. Its totient is φ = 30408618240.

The previous prime is 99128107681. The next prime is 99128107753. The reversal of 99128107728 is 82770182199.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 539643 + ... + 699621.

Almost surely, 2^99128107728 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 99128107728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (149832788560).

99128107728 is an abundant number, since it is smaller than the sum of its proper divisors (200537469392).

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

99128107728 is a wasteful number, since it uses less digits than its factorization.

99128107728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160337 (or 160328 counting only the distinct ones).

The product of its (nonzero) digits is 1016064, while the sum is 54.

The spelling of 99128107728 in words is "ninety-nine billion, one hundred twenty-eight million, one hundred seven thousand, seven hundred twenty-eight".