9663812981 has 8 divisors (see below), whose sum is σ = 9759859200. Its totient is φ = 9567809712.

The previous prime is 9663812971. The next prime is 9663813001. The reversal of 9663812981 is 1892183669.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9663812981 is a prime.

It is a super-2 number, since 2×9663812981² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9663812971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 628220 + ... + 643418.

It is an arithmetic number, because the mean of its divisors is an integer number (1219982400).

Almost surely, 2^9663812981 is an apocalyptic number.

It is an amenable number.

9663812981 is a deficient number, since it is larger than the sum of its proper divisors (96046219).

9663812981 is a wasteful number, since it uses less digits than its factorization.

9663812981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21475.

The product of its digits is 1119744, while the sum is 53.

The square root of 9663812981 is about 98304.6946030555. The cubic root of 9663812981 is about 2130.0158683529.

The spelling of 9663812981 in words is "nine billion, six hundred sixty-three million, eight hundred twelve thousand, nine hundred eighty-one".