8116568461 has 2 divisors, whose sum is σ = 8116568462. Its totient is φ = 8116568460.

The previous prime is 8116568443. The next prime is 8116568477. The reversal of 8116568461 is 1648656118.

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., 7696728361 + 419840100 = 87731^2 + 20490^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8116568461 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8116568441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4058284230 + 4058284231.

It is an arithmetic number, because the mean of its divisors is an integer number (4058284231).

Almost surely, 2^8116568461 is an apocalyptic number.

It is an amenable number.

8116568461 is a deficient number, since it is larger than the sum of its proper divisors (1).

8116568461 is an equidigital number, since it uses as much as digits as its factorization.

8116568461 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 276480, while the sum is 46.

The square root of 8116568461 is about 90091.9999833504. Note that the first 4 decimals coincide. The cubic root of 8116568461 is about 2009.6672354085.

The spelling of 8116568461 in words is "eight billion, one hundred sixteen million, five hundred sixty-eight thousand, four hundred sixty-one".