8516516573 has 2 divisors, whose sum is σ = 8516516574. Its totient is φ = 8516516572.

The previous prime is 8516516543. The next prime is 8516516609. The reversal of 8516516573 is 3756156158.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5733215524 + 2783301049 = 75718^2 + 52757^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8516516573 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8516516543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4258258286 + 4258258287.

It is an arithmetic number, because the mean of its divisors is an integer number (4258258287).

Almost surely, 2^8516516573 is an apocalyptic number.

It is an amenable number.

8516516573 is a deficient number, since it is larger than the sum of its proper divisors (1).

8516516573 is an equidigital number, since it uses as much as digits as its factorization.

8516516573 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 756000, while the sum is 47.

The square root of 8516516573 is about 92284.9747954671. The cubic root of 8516516573 is about 2042.1485575523.

The spelling of 8516516573 in words is "eight billion, five hundred sixteen million, five hundred sixteen thousand, five hundred seventy-three".