206604441613 has 2 divisors, whose sum is σ = 206604441614. Its totient is φ = 206604441612.

The previous prime is 206604441611. The next prime is 206604441619. The reversal of 206604441613 is 316144406602.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 165276397764 + 41328043849 = 406542^2 + 203293^2 .

It is a cyclic number.

It is not a de Polignac number, because 206604441613 - 2¹ = 206604441611 is a prime.

Together with 206604441611, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (206604441611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103302220806 + 103302220807.

It is an arithmetic number, because the mean of its divisors is an integer number (103302220807).

Almost surely, 2^206604441613 is an apocalyptic number.

It is an amenable number.

206604441613 is a deficient number, since it is larger than the sum of its proper divisors (1).

206604441613 is an equidigital number, since it uses as much as digits as its factorization.

206604441613 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 82944, while the sum is 37.

The spelling of 206604441613 in words is "two hundred six billion, six hundred four million, four hundred forty-one thousand, six hundred thirteen".