206240224609 has 2 divisors, whose sum is σ = 206240224610. Its totient is φ = 206240224608.

The previous prime is 206240224591. The next prime is 206240224633. The reversal of 206240224609 is 906422042602.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 188894544400 + 17345680209 = 434620^2 + 131703^2 .

It is a cyclic number.

It is not a de Polignac number, because 206240224609 - 2²¹ = 206238127457 is a prime.

It is not a weakly prime, because it can be changed into another prime (206240224649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103120112304 + 103120112305.

It is an arithmetic number, because the mean of its divisors is an integer number (103120112305).

Almost surely, 2^206240224609 is an apocalyptic number.

It is an amenable number.

206240224609 is a deficient number, since it is larger than the sum of its proper divisors (1).

206240224609 is an equidigital number, since it uses as much as digits as its factorization.

206240224609 is an evil number, because the sum of its binary digits is even.

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

The spelling of 206240224609 in words is "two hundred six billion, two hundred forty million, two hundred twenty-four thousand, six hundred nine".