8194566517 has 2 divisors, whose sum is σ = 8194566518. Its totient is φ = 8194566516.

The previous prime is 8194566503. The next prime is 8194566529. The reversal of 8194566517 is 7156654918.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5119974916 + 3074591601 = 71554^2 + 55449^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8194566517 is a prime.

It is a super-2 number, since 2×8194566517² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8194566547) 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 as a sum of consecutive naturals, namely, 4097283258 + 4097283259.

It is an arithmetic number, because the mean of its divisors is an integer number (4097283259).

Almost surely, 2^8194566517 is an apocalyptic number.

It is an amenable number.

8194566517 is a deficient number, since it is larger than the sum of its proper divisors (1).

8194566517 is an equidigital number, since it uses as much as digits as its factorization.

8194566517 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1814400, while the sum is 52.

The square root of 8194566517 is about 90523.8450188678. The cubic root of 8194566517 is about 2016.0841792563.

The spelling of 8194566517 in words is "eight billion, one hundred ninety-four million, five hundred sixty-six thousand, five hundred seventeen".