205361185491823 has 2 divisors, whose sum is σ = 205361185491824. Its totient is φ = 205361185491822.

The previous prime is 205361185491751. The next prime is 205361185491827. The reversal of 205361185491823 is 328194581163502.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 205361185491823 - 2¹³ = 205361185483631 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (205361185491827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102680592745911 + 102680592745912.

It is an arithmetic number, because the mean of its divisors is an integer number (102680592745912).

Almost surely, 2^{205361185491823} is an apocalyptic number.

205361185491823 is a deficient number, since it is larger than the sum of its proper divisors (1).

205361185491823 is an equidigital number, since it uses as much as digits as its factorization.

205361185491823 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12441600, while the sum is 58.

The spelling of 205361185491823 in words is "two hundred five trillion, three hundred sixty-one billion, one hundred eighty-five million, four hundred ninety-one thousand, eight hundred twenty-three".