204504561353 has 2 divisors, whose sum is σ = 204504561354. Its totient is φ = 204504561352.

The previous prime is 204504561319. The next prime is 204504561361. The reversal of 204504561353 is 353165405402.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 171406764169 + 33097797184 = 414013^2 + 181928^2 .

It is a cyclic number.

It is not a de Polignac number, because 204504561353 - 2⁸ = 204504561097 is a prime.

It is a super-2 number, since 2×204504561353² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (204504561253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102252280676 + 102252280677.

It is an arithmetic number, because the mean of its divisors is an integer number (102252280677).

Almost surely, 2^204504561353 is an apocalyptic number.

It is an amenable number.

204504561353 is a deficient number, since it is larger than the sum of its proper divisors (1).

204504561353 is an equidigital number, since it uses as much as digits as its factorization.

204504561353 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216000, while the sum is 38.

Adding to 204504561353 its reverse (353165405402), we get a palindrome (557669966755).

The spelling of 204504561353 in words is "two hundred four billion, five hundred four million, five hundred sixty-one thousand, three hundred fifty-three".