8321756065 has 16 divisors (see below), whose sum is σ = 11496004992. Its totient is φ = 5664691584.

The previous prime is 8321756041. The next prime is 8321756087. The reversal of 8321756065 is 5606571238.

8321756065 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 8321756065 - 2¹⁹ = 8321231777 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 862959 + ... + 872548.

It is an arithmetic number, because the mean of its divisors is an integer number (718500312).

Almost surely, 2^8321756065 is an apocalyptic number.

It is an amenable number.

8321756065 is a deficient number, since it is larger than the sum of its proper divisors (3174248927).

8321756065 is a wasteful number, since it uses less digits than its factorization.

8321756065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1735656.

The product of its (nonzero) digits is 302400, while the sum is 43.

The square root of 8321756065 is about 91223.6595681186. The cubic root of 8321756065 is about 2026.4613596122.

The spelling of 8321756065 in words is "eight billion, three hundred twenty-one million, seven hundred fifty-six thousand, sixty-five".