206159239912081 has 2 divisors, whose sum is σ = 206159239912082. Its totient is φ = 206159239912080.

The previous prime is 206159239911971. The next prime is 206159239912099. The reversal of 206159239912081 is 180219932951602.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 128629735665025 + 77529504247056 = 11341505^2 + 8805084^2 .

It is a cyclic number.

It is not a de Polignac number, because 206159239912081 - 2⁴³ = 197363146889873 is a prime.

It is a super-2 number, since 2×206159239912081² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (206159239915081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103079619956040 + 103079619956041.

It is an arithmetic number, because the mean of its divisors is an integer number (103079619956041).

Almost surely, 2^{206159239912081} is an apocalyptic number.

It is an amenable number.

206159239912081 is a deficient number, since it is larger than the sum of its proper divisors (1).

206159239912081 is an equidigital number, since it uses as much as digits as its factorization.

206159239912081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4199040, while the sum is 58.

The spelling of 206159239912081 in words is "two hundred six trillion, one hundred fifty-nine billion, two hundred thirty-nine million, nine hundred twelve thousand, eighty-one".