8068568513 has 2 divisors, whose sum is σ = 8068568514. Its totient is φ = 8068568512.

The previous prime is 8068568483. The next prime is 8068568533. The reversal of 8068568513 is 3158658608.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7733971249 + 334597264 = 87943^2 + 18292^2 .

It is a cyclic number.

It is not a de Polignac number, because 8068568513 - 2²⁰ = 8067519937 is a prime.

It is not a weakly prime, because it can be changed into another prime (8068568533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4034284256 + 4034284257.

It is an arithmetic number, because the mean of its divisors is an integer number (4034284257).

Almost surely, 2^8068568513 is an apocalyptic number.

It is an amenable number.

8068568513 is a deficient number, since it is larger than the sum of its proper divisors (1).

8068568513 is an equidigital number, since it uses as much as digits as its factorization.

8068568513 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1382400, while the sum is 50.

The square root of 8068568513 is about 89825.2108987226. The cubic root of 8068568513 is about 2005.6977949018.

The spelling of 8068568513 in words is "eight billion, sixty-eight million, five hundred sixty-eight thousand, five hundred thirteen".