9697843995840 has 2016 divisors, whose sum is σ = 47782806664320. Its totient is φ = 1750609428480.

The previous prime is 9697843995817. The next prime is 9697843995859. The reversal of 9697843995840 is 485993487969.

9697843995840 is a `hidden beast` number, since 9 + 6 + 97 + 8 + 439 + 9 + 58 + 40 = 666.

It is a tau number, because it is divible by the number of its divisors (2016).

It is a self number, because there is not a number n which added to its sum of digits gives 9697843995840.

It is an unprimeable number.

It is a polite number, since it can be written in 287 ways as a sum of consecutive naturals, for example, 539089566 + ... + 539107554.

It is an arithmetic number, because the mean of its divisors is an integer number (23701789020).

Almost surely, 2^{9697843995840} is an apocalyptic number.

9697843995840 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9697843995840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23891403332160).

9697843995840 is an abundant number, since it is smaller than the sum of its proper divisors (38084962668480).

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

9697843995840 is a wasteful number, since it uses less digits than its factorization.

9697843995840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18071 (or 18047 counting only the distinct ones).

The product of its (nonzero) digits is 4232632320, while the sum is 81.

The spelling of 9697843995840 in words is "nine trillion, six hundred ninety-seven billion, eight hundred forty-three million, nine hundred ninety-five thousand, eight hundred forty".