9981100500 has 192 divisors, whose sum is σ = 33334199808. Its totient is φ = 2273356800.

The previous prime is 9981100489. The next prime is 9981100513. The reversal of 9981100500 is 50011899.

It is a super-2 number, since 2×9981100500² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3284982 + ... + 3288018.

It is an arithmetic number, because the mean of its divisors is an integer number (173615624).

Almost surely, 2^9981100500 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 9981100500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16667099904).

9981100500 is an abundant number, since it is smaller than the sum of its proper divisors (23353099308).

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

9981100500 is a wasteful number, since it uses less digits than its factorization.

9981100500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3379 (or 3367 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 33.

The square root of 9981100500 is about 99905.4578088705. The cubic root of 9981100500 is about 2153.0765761356.

The spelling of 9981100500 in words is "nine billion, nine hundred eighty-one million, one hundred thousand, five hundred".