9901263984 has 80 divisors (see below), whose sum is σ = 26484019200. Its totient is φ = 3183755008.

The previous prime is 9901263929. The next prime is 9901263989. The reversal of 9901263984 is 4893621099.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9901263989) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2000617 + ... + 2005559.

It is an arithmetic number, because the mean of its divisors is an integer number (331050240).

Almost surely, 2^9901263984 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 9901263984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13242009600).

9901263984 is an abundant number, since it is smaller than the sum of its proper divisors (16582755216).

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

9901263984 is a wasteful number, since it uses less digits than its factorization.

9901263984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6422 (or 6416 counting only the distinct ones).

The product of its (nonzero) digits is 839808, while the sum is 51.

The square root of 9901263984 is about 99505.0952665239. The cubic root of 9901263984 is about 2147.3205477333.

The spelling of 9901263984 in words is "nine billion, nine hundred one million, two hundred sixty-three thousand, nine hundred eighty-four".