9971941991863 has 8 divisors (see below), whose sum is σ = 10140353458976. Its totient is φ = 9803689783200.

The previous prime is 9971941991797. The next prime is 9971941991911. The reversal of 9971941991863 is 3681991491799.

9971941991863 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 9971941991863 - 2²⁹ = 9971405120951 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 9971941991863.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9971948991863) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39688323 + ... + 39938788.

It is an arithmetic number, because the mean of its divisors is an integer number (1267544182372).

Almost surely, 2^{9971941991863} is an apocalyptic number.

9971941991863 is a deficient number, since it is larger than the sum of its proper divisors (168411467113).

9971941991863 is a wasteful number, since it uses less digits than its factorization.

9971941991863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79629225.

The product of its digits is 238085568, while the sum is 76.

The spelling of 9971941991863 in words is "nine trillion, nine hundred seventy-one billion, nine hundred forty-one million, nine hundred ninety-one thousand, eight hundred sixty-three".