9681959808 has 448 divisors, whose sum is σ = 31394457600. Its totient is φ = 2962842624.

The previous prime is 9681959783. The next prime is 9681959809. The reversal of 9681959808 is 8089591869.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9681959809) by changing a digit.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 76235841 + ... + 76235967.

Almost surely, 2^9681959808 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 9681959808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15697228800).

9681959808 is an abundant number, since it is smaller than the sum of its proper divisors (21712497792).

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

9681959808 is a wasteful number, since it uses less digits than its factorization.

9681959808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221 (or 194 counting only the distinct ones).

The product of its (nonzero) digits is 11197440, while the sum is 63.

The square root of 9681959808 is about 98396.9501966397. The cubic root of 9681959808 is about 2131.3482913615.

The spelling of 9681959808 in words is "nine billion, six hundred eighty-one million, nine hundred fifty-nine thousand, eight hundred eight".