9663984280 has 32 divisors (see below), whose sum is σ = 21882475440. Its totient is φ = 3840969600.

The previous prime is 9663984263. The next prime is 9663984283. The reversal of 9663984280 is 824893669.

It is a happy number.

It is a Smith number, since the sum of its digits (55) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9663984283) 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, 763146 + ... + 775705.

Almost surely, 2^9663984280 is an apocalyptic number.

It is an amenable number.

9663984280 is an abundant number, since it is smaller than the sum of its proper divisors (12218491160).

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

9663984280 is a wasteful number, since it uses less digits than its factorization.

9663984280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1539019 (or 1539015 counting only the distinct ones).

The product of its (nonzero) digits is 4478976, while the sum is 55.

The square root of 9663984280 is about 98305.5658648075. The cubic root of 9663984280 is about 2130.0284537038.

The spelling of 9663984280 in words is "nine billion, six hundred sixty-three million, nine hundred eighty-four thousand, two hundred eighty".