9988576500 has 144 divisors (see below), whose sum is σ = 33835838400. Its totient is φ = 2283086400.

The previous prime is 9988576453. The next prime is 9988576501. The reversal of 9988576500 is 56758899.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9988576501) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5551 + ... + 141449.

It is an arithmetic number, because the mean of its divisors is an integer number (234971100).

Almost surely, 2^9988576500 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 9988576500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16917919200).

9988576500 is an abundant number, since it is smaller than the sum of its proper divisors (23847261900).

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

9988576500 is a wasteful number, since it uses less digits than its factorization.

9988576500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135935 (or 135916 counting only the distinct ones).

The product of its (nonzero) digits is 5443200, while the sum is 57.

The square root of 9988576500 is about 99942.8661786323. The cubic root of 9988576500 is about 2153.6140046265.

The spelling of 9988576500 in words is "nine billion, nine hundred eighty-eight million, five hundred seventy-six thousand, five hundred".