205264284161 has 2 divisors, whose sum is σ = 205264284162. Its totient is φ = 205264284160.

The previous prime is 205264284149. The next prime is 205264284179. The reversal of 205264284161 is 161482462502.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 121500347761 + 83763936400 = 348569^2 + 289420^2 .

It is a cyclic number.

It is not a de Polignac number, because 205264284161 - 2¹⁸ = 205264022017 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (205264284131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102632142080 + 102632142081.

It is an arithmetic number, because the mean of its divisors is an integer number (102632142081).

Almost surely, 2^205264284161 is an apocalyptic number.

It is an amenable number.

205264284161 is a deficient number, since it is larger than the sum of its proper divisors (1).

205264284161 is an equidigital number, since it uses as much as digits as its factorization.

205264284161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 184320, while the sum is 41.

The spelling of 205264284161 in words is "two hundred five billion, two hundred sixty-four million, two hundred eighty-four thousand, one hundred sixty-one".