204420464523601 has 2 divisors, whose sum is σ = 204420464523602. Its totient is φ = 204420464523600.

The previous prime is 204420464523599. The next prime is 204420464523637. The reversal of 204420464523601 is 106325464024402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 192932100000000 + 11488364523601 = 13890000^2 + 3389449^2 .

It is a cyclic number.

It is not a de Polignac number, because 204420464523601 - 2¹ = 204420464523599 is a prime.

Together with 204420464523599, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (204420464523101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102210232261800 + 102210232261801.

It is an arithmetic number, because the mean of its divisors is an integer number (102210232261801).

Almost surely, 2^{204420464523601} is an apocalyptic number.

It is an amenable number.

204420464523601 is a deficient number, since it is larger than the sum of its proper divisors (1).

204420464523601 is an equidigital number, since it uses as much as digits as its factorization.

204420464523601 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1105920, while the sum is 43.

The spelling of 204420464523601 in words is "two hundred four trillion, four hundred twenty billion, four hundred sixty-four million, five hundred twenty-three thousand, six hundred one".