8447522240809 has 2 divisors, whose sum is σ = 8447522240810. Its totient is φ = 8447522240808.

The previous prime is 8447522240797. The next prime is 8447522240867. The reversal of 8447522240809 is 9080422257448.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5262564464784 + 3184957776025 = 2294028^2 + 1784645^2 .

It is a cyclic number.

It is not a de Polignac number, because 8447522240809 - 2⁷ = 8447522240681 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 8447522240809.

It is not a weakly prime, because it can be changed into another prime (8447522240869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4223761120404 + 4223761120405.

It is an arithmetic number, because the mean of its divisors is an integer number (4223761120405).

Almost surely, 2^{8447522240809} is an apocalyptic number.

It is an amenable number.

8447522240809 is a deficient number, since it is larger than the sum of its proper divisors (1).

8447522240809 is an equidigital number, since it uses as much as digits as its factorization.

8447522240809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10321920, while the sum is 55.

The spelling of 8447522240809 in words is "eight trillion, four hundred forty-seven billion, five hundred twenty-two million, two hundred forty thousand, eight hundred nine".