8516559641 has 2 divisors, whose sum is σ = 8516559642. Its totient is φ = 8516559640.

The previous prime is 8516559593. The next prime is 8516559679. The reversal of 8516559641 is 1469556158.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8516521225 + 38416 = 92285^2 + 196^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8516559641 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 8516559641.

It is not a weakly prime, because it can be changed into another prime (8516559341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4258279820 + 4258279821.

It is an arithmetic number, because the mean of its divisors is an integer number (4258279821).

Almost surely, 2^8516559641 is an apocalyptic number.

It is an amenable number.

8516559641 is a deficient number, since it is larger than the sum of its proper divisors (1).

8516559641 is an equidigital number, since it uses as much as digits as its factorization.

8516559641 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1296000, while the sum is 50.

The square root of 8516559641 is about 92285.2081375992. The cubic root of 8516559641 is about 2042.1519999263.

The spelling of 8516559641 in words is "eight billion, five hundred sixteen million, five hundred fifty-nine thousand, six hundred forty-one".