9721982563 has 8 divisors (see below), whose sum is σ = 9785412000. Its totient is φ = 9658636608.

The previous prime is 9721982561. The next prime is 9721982573. The reversal of 9721982563 is 3652891279.

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 9721982563 - 2¹ = 9721982561 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 9721982563.

It is not an unprimeable number, because it can be changed into a prime (9721982561) 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, 221943 + ... + 262111.

It is an arithmetic number, because the mean of its divisors is an integer number (1223176500).

Almost surely, 2^9721982563 is an apocalyptic number.

9721982563 is a deficient number, since it is larger than the sum of its proper divisors (63429437).

9721982563 is a wasteful number, since it uses less digits than its factorization.

9721982563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41741.

The product of its digits is 1632960, while the sum is 52.

The square root of 9721982563 is about 98600.1144167693. The cubic root of 9721982563 is about 2134.2810708766.

The spelling of 9721982563 in words is "nine billion, seven hundred twenty-one million, nine hundred eighty-two thousand, five hundred sixty-three".