204545412517 has 2 divisors, whose sum is σ = 204545412518. Its totient is φ = 204545412516.

The previous prime is 204545412457. The next prime is 204545412527. The reversal of 204545412517 is 715214545402.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 131079478401 + 73465934116 = 362049^2 + 271046^2 .

It is a cyclic number.

It is not a de Polignac number, because 204545412517 - 2³¹ = 202397928869 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 204545412517.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (204545412527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102272706258 + 102272706259.

It is an arithmetic number, because the mean of its divisors is an integer number (102272706259).

Almost surely, 2^204545412517 is an apocalyptic number.

It is an amenable number.

204545412517 is a deficient number, since it is larger than the sum of its proper divisors (1).

204545412517 is an equidigital number, since it uses as much as digits as its factorization.

204545412517 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 224000, while the sum is 40.

Adding to 204545412517 its reverse (715214545402), we get a palindrome (919759957919).

The spelling of 204545412517 in words is "two hundred four billion, five hundred forty-five million, four hundred twelve thousand, five hundred seventeen".