206611729568 has 12 divisors (see below), whose sum is σ = 406766842650. Its totient is φ = 103305864768.

The previous prime is 206611729553. The next prime is 206611729573. The reversal of 206611729568 is 865927116602.

It can be written as a sum of positive squares in only one way, i.e., 198441739024 + 8169990544 = 445468^2 + 90388^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3228308243 + ... + 3228308306.

Almost surely, 2^206611729568 is an apocalyptic number.

It is an amenable number.

206611729568 is a deficient number, since it is larger than the sum of its proper divisors (200155113082).

206611729568 is an equidigital number, since it uses as much as digits as its factorization.

206611729568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6456616559 (or 6456616551 counting only the distinct ones).

The product of its (nonzero) digits is 2177280, while the sum is 53.

The spelling of 206611729568 in words is "two hundred six billion, six hundred eleven million, seven hundred twenty-nine thousand, five hundred sixty-eight".