8275780028209 has 2 divisors, whose sum is σ = 8275780028210. Its totient is φ = 8275780028208.

The previous prime is 8275780028171. The next prime is 8275780028279. The reversal of 8275780028209 is 9028200875728.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8018507899809 + 257272128400 = 2831697^2 + 507220^2 .

It is a cyclic number.

It is not a de Polignac number, because 8275780028209 - 2¹⁷ = 8275779897137 is a prime.

It is not a weakly prime, because it can be changed into another prime (8275780028279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4137890014104 + 4137890014105.

It is an arithmetic number, because the mean of its divisors is an integer number (4137890014105).

Almost surely, 2^{8275780028209} is an apocalyptic number.

It is an amenable number.

8275780028209 is a deficient number, since it is larger than the sum of its proper divisors (1).

8275780028209 is an equidigital number, since it uses as much as digits as its factorization.

8275780028209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9031680, while the sum is 58.

The spelling of 8275780028209 in words is "eight trillion, two hundred seventy-five billion, seven hundred eighty million, twenty-eight thousand, two hundred nine".