8563920321 has 48 divisors (see below), whose sum is σ = 12777907968. Its totient is φ = 5097058560.

The previous prime is 8563920319. The next prime is 8563920347. The reversal of 8563920321 is 1230293658.

It is not a de Polignac number, because 8563920321 - 2¹ = 8563920319 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 8563920321.

It is not an unprimeable number, because it can be changed into a prime (8563920121) 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 in 47 ways as a sum of consecutive naturals, for example, 7763656 + ... + 7764758.

It is an arithmetic number, because the mean of its divisors is an integer number (266206416).

Almost surely, 2^8563920321 is an apocalyptic number.

It is an amenable number.

8563920321 is a deficient number, since it is larger than the sum of its proper divisors (4213987647).

8563920321 is a wasteful number, since it uses less digits than its factorization.

8563920321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1494 (or 1483 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 39.

The square root of 8563920321 is about 92541.4519066996. The cubic root of 8563920321 is about 2045.9304809308.

The spelling of 8563920321 in words is "eight billion, five hundred sixty-three million, nine hundred twenty thousand, three hundred twenty-one".