8245668817 has 2 divisors, whose sum is σ = 8245668818. Its totient is φ = 8245668816.

The previous prime is 8245668779. The next prime is 8245668853. The reversal of 8245668817 is 7188665428.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7969311441 + 276357376 = 89271^2 + 16624^2 .

It is a cyclic number.

It is not a de Polignac number, because 8245668817 - 2²³ = 8237280209 is a prime.

It is not a weakly prime, because it can be changed into another prime (8245668217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4122834408 + 4122834409.

It is an arithmetic number, because the mean of its divisors is an integer number (4122834409).

Almost surely, 2^8245668817 is an apocalyptic number.

It is an amenable number.

8245668817 is a deficient number, since it is larger than the sum of its proper divisors (1).

8245668817 is an equidigital number, since it uses as much as digits as its factorization.

8245668817 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5160960, while the sum is 55.

The square root of 8245668817 is about 90805.6651151237. The cubic root of 8245668817 is about 2020.2663453816.

The spelling of 8245668817 in words is "eight billion, two hundred forty-five million, six hundred sixty-eight thousand, eight hundred seventeen".