9581081688 has 96 divisors (see below), whose sum is σ = 26254800000. Its totient is φ = 3156185088.

The previous prime is 9581081651. The next prime is 9581081717. The reversal of 9581081688 is 8861801859.

It is a Cunningham number, because it is equal to 97883²-1.

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, 3522393 + ... + 3525111.

It is an arithmetic number, because the mean of its divisors is an integer number (273487500).

Almost surely, 2^9581081688 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 9581081688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13127400000).

9581081688 is an abundant number, since it is smaller than the sum of its proper divisors (16673718312).

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

9581081688 is a wasteful number, since it uses less digits than its factorization.

9581081688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3289 (or 3282 counting only the distinct ones).

The product of its (nonzero) digits is 1105920, while the sum is 54.

The square root of 9581081688 is about 97882.9999948919. Note that the first 5 decimals coincide. The cubic root of 9581081688 is about 2123.9201295681.

The spelling of 9581081688 in words is "nine billion, five hundred eighty-one million, eighty-one thousand, six hundred eighty-eight".