9681242172 has 96 divisors (see below), whose sum is σ = 26568622080. Its totient is φ = 2686407360.

The previous prime is 9681242167. The next prime is 9681242177. The reversal of 9681242172 is 2712421869.

It is an interprime number because it is at equal distance from previous prime (9681242167) and next prime (9681242177).

It is a super-2 number, since 2×9681242172² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9681242177) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 507829 + ... + 526547.

It is an arithmetic number, because the mean of its divisors is an integer number (276756480).

Almost surely, 2^9681242172 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 9681242172, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13284311040).

9681242172 is an abundant number, since it is smaller than the sum of its proper divisors (16887379908).

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

9681242172 is a wasteful number, since it uses less digits than its factorization.

9681242172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18911 (or 18909 counting only the distinct ones).

The product of its digits is 96768, while the sum is 42.

The square root of 9681242172 is about 98393.3034916503. The cubic root of 9681242172 is about 2131.2956308780.

The spelling of 9681242172 in words is "nine billion, six hundred eighty-one million, two hundred forty-two thousand, one hundred seventy-two".