99128368788 has 24 divisors (see below), whose sum is σ = 232772776992. Its totient is φ = 32832325344.

The previous prime is 99128368783. The next prime is 99128368897. The reversal of 99128368788 is 88786382199.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99128368783) 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 7 ways as a sum of consecutive naturals, for example, 26306070 + ... + 26309837.

It is an arithmetic number, because the mean of its divisors is an integer number (9698865708).

Almost surely, 2^99128368788 is an apocalyptic number.

It is an amenable number.

99128368788 is an abundant number, since it is smaller than the sum of its proper divisors (133644408204).

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

99128368788 is a wasteful number, since it uses less digits than its factorization.

99128368788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52616071 (or 52616069 counting only the distinct ones).

The product of its digits is 83607552, while the sum is 69.

The spelling of 99128368788 in words is "ninety-nine billion, one hundred twenty-eight million, three hundred sixty-eight thousand, seven hundred eighty-eight".