99856192128 has 768 divisors, whose sum is σ = 353640038400. Its totient is φ = 24656486400.

The previous prime is 99856192123. The next prime is 99856192129. The reversal of 99856192128 is 82129165899.

It is not an unprimeable number, because it can be changed into a prime (99856192123) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 506884126 + ... + 506884322.

It is an arithmetic number, because the mean of its divisors is an integer number (460468800).

Almost surely, 2^99856192128 is an apocalyptic number.

99856192128 is a gapful number since it is divisible by the number (98) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 99856192128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (176820019200).

99856192128 is an abundant number, since it is smaller than the sum of its proper divisors (253783846272).

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

99856192128 is a wasteful number, since it uses less digits than its factorization.

99856192128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 349 (or 330 counting only the distinct ones).

The product of its digits is 5598720, while the sum is 60.

The spelling of 99856192128 in words is "ninety-nine billion, eight hundred fifty-six million, one hundred ninety-two thousand, one hundred twenty-eight".