9911010872 has 48 divisors (see below), whose sum is σ = 21653730000. Its totient is φ = 4240384512.

The previous prime is 9911010839. The next prime is 9911010881. The reversal of 9911010872 is 2780101199.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 213704 + ... + 255912.

It is an arithmetic number, because the mean of its divisors is an integer number (451119375).

Almost surely, 2^9911010872 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 9911010872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10826865000).

9911010872 is an abundant number, since it is smaller than the sum of its proper divisors (11742719128).

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

9911010872 is a wasteful number, since it uses less digits than its factorization.

9911010872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42828 (or 42817 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 38.

The square root of 9911010872 is about 99554.0600477951. The cubic root of 9911010872 is about 2148.0249301528.

The spelling of 9911010872 in words is "nine billion, nine hundred eleven million, ten thousand, eight hundred seventy-two".