9909000000 has 392 divisors, whose sum is σ = 36512032640. Its totient is φ = 2635200000.

The previous prime is 9908999999. The next prime is 9909000019. The reversal of 9909000000 is 9099.

9909000000 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 (27).

It is a super Niven number, because it is divisible the sum of any subset of its (nonzero) digits.

It is a congruent number.

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 55 ways as a sum of consecutive naturals, for example, 26999817 + ... + 27000183.

Almost surely, 2^9909000000 is an apocalyptic number.

9909000000 is a gapful number since it is divisible by the number (90) 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 9909000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18256016320).

9909000000 is an abundant number, since it is smaller than the sum of its proper divisors (26603032640).

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

9909000000 is an frugal number, since it uses more digits than its factorization.

9909000000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 418 (or 377 counting only the distinct ones).

The product of its (nonzero) digits is 729, while the sum is 27.

The square root of 9909000000 is about 99543.9601382223. The cubic root of 9909000000 is about 2147.8796474498.

Adding to 9909000000 its reverse (9099), we get a palindrome (9909009099).

The spelling of 9909000000 in words is "nine billion, nine hundred nine million", and thus it is an aban number.