204451040124481 has 2 divisors, whose sum is σ = 204451040124482. Its totient is φ = 204451040124480.

The previous prime is 204451040124473. The next prime is 204451040124607. The reversal of 204451040124481 is 184421040154402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 198330438344256 + 6120601780225 = 14082984^2 + 2473985^2 .

It is a cyclic number.

It is not a de Polignac number, because 204451040124481 - 2³ = 204451040124473 is a prime.

It is a super-2 number, since 2×204451040124481² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (204451040184481) 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, 102225520062240 + 102225520062241.

It is an arithmetic number, because the mean of its divisors is an integer number (102225520062241).

Almost surely, 2^{204451040124481} is an apocalyptic number.

It is an amenable number.

204451040124481 is a deficient number, since it is larger than the sum of its proper divisors (1).

204451040124481 is an equidigital number, since it uses as much as digits as its factorization.

204451040124481 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 163840, while the sum is 40.

Adding to 204451040124481 its reverse (184421040154402), we get a palindrome (388872080278883).

The spelling of 204451040124481 in words is "two hundred four trillion, four hundred fifty-one billion, forty million, one hundred twenty-four thousand, four hundred eighty-one".