9681731899964 has 6 divisors (see below), whose sum is σ = 16943030824944. Its totient is φ = 4840865949980.

The previous prime is 9681731899963. The next prime is 9681731899969. The reversal of 9681731899964 is 4699981371869.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9681731899963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1210216487492 + ... + 1210216487499.

It is an arithmetic number, because the mean of its divisors is an integer number (2823838470824).

Almost surely, 2^{9681731899964} is an apocalyptic number.

It is an amenable number.

9681731899964 is a deficient number, since it is larger than the sum of its proper divisors (7261298924980).

9681731899964 is a wasteful number, since it uses less digits than its factorization.

9681731899964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2420432974995 (or 2420432974993 counting only the distinct ones).

The product of its digits is 1269789696, while the sum is 80.

The spelling of 9681731899964 in words is "nine trillion, six hundred eighty-one billion, seven hundred thirty-one million, eight hundred ninety-nine thousand, nine hundred sixty-four".