204003633649 has 2 divisors, whose sum is σ = 204003633650. Its totient is φ = 204003633648.

The previous prime is 204003633511. The next prime is 204003633661. The reversal of 204003633649 is 946336300402.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 138825543649 + 65178090000 = 372593^2 + 255300^2 .

It is a cyclic number.

It is not a de Polignac number, because 204003633649 - 2¹³ = 204003625457 is a prime.

It is not a weakly prime, because it can be changed into another prime (204003633679) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102001816824 + 102001816825.

It is an arithmetic number, because the mean of its divisors is an integer number (102001816825).

Almost surely, 2^204003633649 is an apocalyptic number.

It is an amenable number.

204003633649 is a deficient number, since it is larger than the sum of its proper divisors (1).

204003633649 is an equidigital number, since it uses as much as digits as its factorization.

204003633649 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 279936, while the sum is 40.

The spelling of 204003633649 in words is "two hundred four billion, three million, six hundred thirty-three thousand, six hundred forty-nine".