204423501449 has 2 divisors, whose sum is σ = 204423501450. Its totient is φ = 204423501448.

The previous prime is 204423501439. The next prime is 204423501497. The reversal of 204423501449 is 944105324402.

It is a happy number.

204423501449 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 204423345424 + 156025 = 452132^2 + 395^2 .

It is a cyclic number.

It is not a de Polignac number, because 204423501449 - 2⁸ = 204423501193 is a prime.

It is not a weakly prime, because it can be changed into another prime (204423501439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102211750724 + 102211750725.

It is an arithmetic number, because the mean of its divisors is an integer number (102211750725).

Almost surely, 2^204423501449 is an apocalyptic number.

It is an amenable number.

204423501449 is a deficient number, since it is larger than the sum of its proper divisors (1).

204423501449 is an equidigital number, since it uses as much as digits as its factorization.

204423501449 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 138240, while the sum is 38.

The spelling of 204423501449 in words is "two hundred four billion, four hundred twenty-three million, five hundred one thousand, four hundred forty-nine".