206611361717 has 2 divisors, whose sum is σ = 206611361718. Its totient is φ = 206611361716.

The previous prime is 206611361711. The next prime is 206611361731. The reversal of 206611361717 is 717163116602.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 116154182596 + 90457179121 = 340814^2 + 300761^2 .

It is a cyclic number.

It is not a de Polignac number, because 206611361717 - 2⁸ = 206611361461 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (206611361711) 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, 103305680858 + 103305680859.

It is an arithmetic number, because the mean of its divisors is an integer number (103305680859).

Almost surely, 2^206611361717 is an apocalyptic number.

It is an amenable number.

206611361717 is a deficient number, since it is larger than the sum of its proper divisors (1).

206611361717 is an equidigital number, since it uses as much as digits as its factorization.

206611361717 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 63504, while the sum is 41.

The spelling of 206611361717 in words is "two hundred six billion, six hundred eleven million, three hundred sixty-one thousand, seven hundred seventeen".