208558365241 has 2 divisors, whose sum is σ = 208558365242. Its totient is φ = 208558365240.

The previous prime is 208558365203. The next prime is 208558365319. The reversal of 208558365241 is 142563855802.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 199358678016 + 9199687225 = 446496^2 + 95915^2 .

It is a cyclic number.

It is not a de Polignac number, because 208558365241 - 2¹¹ = 208558363193 is a prime.

It is not a weakly prime, because it can be changed into another prime (208558363241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 104279182620 + 104279182621.

It is an arithmetic number, because the mean of its divisors is an integer number (104279182621).

Almost surely, 2^208558365241 is an apocalyptic number.

It is an amenable number.

208558365241 is a deficient number, since it is larger than the sum of its proper divisors (1).

208558365241 is an equidigital number, since it uses as much as digits as its factorization.

208558365241 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2304000, while the sum is 49.

The spelling of 208558365241 in words is "two hundred eight billion, five hundred fifty-eight million, three hundred sixty-five thousand, two hundred forty-one".