9689131721664 has 196 divisors, whose sum is σ = 28839497734656. Its totient is φ = 3228323724288.

The previous prime is 9689131721653. The next prime is 9689131721729. The reversal of 9689131721664 is 4661271319869.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 111604417 + ... + 111691199.

Almost surely, 2^{9689131721664} 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 9689131721664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14419748867328).

9689131721664 is an abundant number, since it is smaller than the sum of its proper divisors (19150366012992).

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

9689131721664 is an equidigital number, since it uses as much as digits as its factorization.

9689131721664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89206 (or 89181 counting only the distinct ones).

The product of its digits is 23514624, while the sum is 63.

The spelling of 9689131721664 in words is "nine trillion, six hundred eighty-nine billion, one hundred thirty-one million, seven hundred twenty-one thousand, six hundred sixty-four".