9888999912 has 320 divisors, whose sum is σ = 31308120000. Its totient is φ = 2890293120.

The previous prime is 9888999899. The next prime is 9888999947. The reversal of 9888999912 is 2199998889.

9888999912 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a nude number because it is divisible by every one of its digits.

Its product of digits (60466176) is a multiple of the sum of its prime divisors (128).

It is an unprimeable number.

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 79 ways as a sum of consecutive naturals, for example, 167610139 + ... + 167610197.

It is an arithmetic number, because the mean of its divisors is an integer number (97837875).

Almost surely, 2^9888999912 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 9888999912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15654060000).

9888999912 is an abundant number, since it is smaller than the sum of its proper divisors (21419120088).

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

9888999912 is a wasteful number, since it uses less digits than its factorization.

9888999912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171 (or 128 counting only the distinct ones).

The product of its digits is 60466176, while the sum is 72.

The square root of 9888999912 is about 99443.4508250795. The cubic root of 9888999912 is about 2146.4335978630.

The spelling of 9888999912 in words is "nine billion, eight hundred eighty-eight million, nine hundred ninety-nine thousand, nine hundred twelve".