210646206366241 has 2 divisors, whose sum is σ = 210646206366242. Its totient is φ = 210646206366240.

The previous prime is 210646206366229. The next prime is 210646206366313. The reversal of 210646206366241 is 142663602646012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 209417221275025 + 1228985091216 = 14471255^2 + 1108596^2 .

It is a cyclic number.

It is not a de Polignac number, because 210646206366241 - 2²¹ = 210646204269089 is a prime.

It is not a weakly prime, because it can be changed into another prime (210646906366241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105323103183120 + 105323103183121.

It is an arithmetic number, because the mean of its divisors is an integer number (105323103183121).

Almost surely, 2^{210646206366241} is an apocalyptic number.

It is an amenable number.

210646206366241 is a deficient number, since it is larger than the sum of its proper divisors (1).

210646206366241 is an equidigital number, since it uses as much as digits as its factorization.

210646206366241 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2985984, while the sum is 49.

The spelling of 210646206366241 in words is "two hundred ten trillion, six hundred forty-six billion, two hundred six million, three hundred sixty-six thousand, two hundred forty-one".