206255855671 has 2 divisors, whose sum is σ = 206255855672. Its totient is φ = 206255855670.

The previous prime is 206255855657. The next prime is 206255855779. The reversal of 206255855671 is 176558552602.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 206255855671 - 2⁵ = 206255855639 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (206255955671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103127927835 + 103127927836.

It is an arithmetic number, because the mean of its divisors is an integer number (103127927836).

Almost surely, 2^206255855671 is an apocalyptic number.

206255855671 is a deficient number, since it is larger than the sum of its proper divisors (1).

206255855671 is an equidigital number, since it uses as much as digits as its factorization.

206255855671 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5040000, while the sum is 52.

The spelling of 206255855671 in words is "two hundred six billion, two hundred fifty-five million, eight hundred fifty-five thousand, six hundred seventy-one".