205320065334457 has 2 divisors, whose sum is σ = 205320065334458. Its totient is φ = 205320065334456.

The previous prime is 205320065334437. The next prime is 205320065334479. The reversal of 205320065334457 is 754433560023502.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 198945975442041 + 6374089892416 = 14104821^2 + 2524696^2 .

It is a cyclic number.

It is not a de Polignac number, because 205320065334457 - 2¹⁹ = 205320064810169 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 205320065334457.

It is not a weakly prime, because it can be changed into another prime (205320065334437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102660032667228 + 102660032667229.

It is an arithmetic number, because the mean of its divisors is an integer number (102660032667229).

Almost surely, 2^{205320065334457} is an apocalyptic number.

It is an amenable number.

205320065334457 is a deficient number, since it is larger than the sum of its proper divisors (1).

205320065334457 is an equidigital number, since it uses as much as digits as its factorization.

205320065334457 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9072000, while the sum is 49.

The spelling of 205320065334457 in words is "two hundred five trillion, three hundred twenty billion, sixty-five million, three hundred thirty-four thousand, four hundred fifty-seven".