206159239972157 has 2 divisors, whose sum is σ = 206159239972158. Its totient is φ = 206159239972156.

The previous prime is 206159239972057. The next prime is 206159239972159. The reversal of 206159239972157 is 751279932951602.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 164729755114681 + 41429484857476 = 12834709^2 + 6436574^2 .

It is a cyclic number.

It is not a de Polignac number, because 206159239972157 - 2¹⁶ = 206159239906621 is a prime.

Together with 206159239972159, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (206159239972159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103079619986078 + 103079619986079.

It is an arithmetic number, because the mean of its divisors is an integer number (103079619986079).

Almost surely, 2^{206159239972157} is an apocalyptic number.

It is an amenable number.

206159239972157 is a deficient number, since it is larger than the sum of its proper divisors (1).

206159239972157 is an equidigital number, since it uses as much as digits as its factorization.

206159239972157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 128595600, while the sum is 68.

The spelling of 206159239972157 in words is "two hundred six trillion, one hundred fifty-nine billion, two hundred thirty-nine million, nine hundred seventy-two thousand, one hundred fifty-seven".