9891242160 has 120 divisors (see below), whose sum is σ = 31130726256. Its totient is φ = 2598013440.

The previous prime is 9891242159. The next prime is 9891242201. The reversal of 9891242160 is 612421989.

It is a tau number, because it is divible by the number of its divisors (120).

It is a super-2 number, since 2×9891242160² (a number of 21 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1072770 + ... + 1081950.

Almost surely, 2^9891242160 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 9891242160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15565363128).

9891242160 is an abundant number, since it is smaller than the sum of its proper divisors (21239484096).

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

9891242160 is a wasteful number, since it uses less digits than its factorization.

9891242160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9331 (or 9258 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 42.

The square root of 9891242160 is about 99454.7241713535. The cubic root of 9891242160 is about 2146.5958142238.

The spelling of 9891242160 in words is "nine billion, eight hundred ninety-one million, two hundred forty-two thousand, one hundred sixty".