8185842055217 has 2 divisors, whose sum is σ = 8185842055218. Its totient is φ = 8185842055216.

The previous prime is 8185842055169. The next prime is 8185842055229. The reversal of 8185842055217 is 7125502485818.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7775308403776 + 410533651441 = 2788424^2 + 640729^2 .

It is a cyclic number.

It is not a de Polignac number, because 8185842055217 - 2¹⁶ = 8185841989681 is a prime.

It is not a weakly prime, because it can be changed into another prime (8185842055817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4092921027608 + 4092921027609.

It is an arithmetic number, because the mean of its divisors is an integer number (4092921027609).

Almost surely, 2^{8185842055217} is an apocalyptic number.

It is an amenable number.

8185842055217 is a deficient number, since it is larger than the sum of its proper divisors (1).

8185842055217 is an equidigital number, since it uses as much as digits as its factorization.

8185842055217 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7168000, while the sum is 56.

The spelling of 8185842055217 in words is "eight trillion, one hundred eighty-five billion, eight hundred forty-two million, fifty-five thousand, two hundred seventeen".