8544266561 has 2 divisors, whose sum is σ = 8544266562. Its totient is φ = 8544266560.

The previous prime is 8544266537. The next prime is 8544266569. The reversal of 8544266561 is 1656624458.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6359265025 + 2185001536 = 79745^2 + 46744^2 .

It is a cyclic number.

It is not a de Polignac number, because 8544266561 - 2²² = 8540072257 is a prime.

It is not a weakly prime, because it can be changed into another prime (8544266569) 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, 4272133280 + 4272133281.

It is an arithmetic number, because the mean of its divisors is an integer number (4272133281).

Almost surely, 2^8544266561 is an apocalyptic number.

It is an amenable number.

8544266561 is a deficient number, since it is larger than the sum of its proper divisors (1).

8544266561 is an equidigital number, since it uses as much as digits as its factorization.

8544266561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1382400, while the sum is 47.

The square root of 8544266561 is about 92435.2019579121. The cubic root of 8544266561 is about 2044.3641801184.

The spelling of 8544266561 in words is "eight billion, five hundred forty-four million, two hundred sixty-six thousand, five hundred sixty-one".