9681731899963 has 2 divisors, whose sum is σ = 9681731899964. Its totient is φ = 9681731899962.

The previous prime is 9681731899949. The next prime is 9681731899969. The reversal of 9681731899963 is 3699981371869.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9681731899963 is a prime.

It is a super-2 number, since 2×9681731899963² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (9681731899969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4840865949981 + 4840865949982.

It is an arithmetic number, because the mean of its divisors is an integer number (4840865949982).

Almost surely, 2^{9681731899963} is an apocalyptic number.

9681731899963 is a deficient number, since it is larger than the sum of its proper divisors (1).

9681731899963 is an equidigital number, since it uses as much as digits as its factorization.

9681731899963 is an evil number, because the sum of its binary digits is even.

The product of its digits is 952342272, while the sum is 79.

The spelling of 9681731899963 in words is "nine trillion, six hundred eighty-one billion, seven hundred thirty-one million, eight hundred ninety-nine thousand, nine hundred sixty-three".