9681856884 has 192 divisors, whose sum is σ = 30220288000. Its totient is φ = 2676693600.

The previous prime is 9681856867. The next prime is 9681856889. The reversal of 9681856884 is 4886581869.

9681856884 is a `hidden beast` number, since 9 + 68 + 1 + 8 + 568 + 8 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9681856889) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1144149 + ... + 1152579.

Almost surely, 2^9681856884 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 9681856884, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15110144000).

9681856884 is an abundant number, since it is smaller than the sum of its proper divisors (20538431116).

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

9681856884 is a wasteful number, since it uses less digits than its factorization.

9681856884 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8496 (or 8474 counting only the distinct ones).

The product of its digits is 26542080, while the sum is 63.

The square root of 9681856884 is about 98396.4271912349. The cubic root of 9681856884 is about 2131.3407389075.

The spelling of 9681856884 in words is "nine billion, six hundred eighty-one million, eight hundred fifty-six thousand, eight hundred eighty-four".