204388854161 has 2 divisors, whose sum is σ = 204388854162. Its totient is φ = 204388854160.

The previous prime is 204388854157. The next prime is 204388854169. The reversal of 204388854161 is 161458883402.

204388854161 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., 180046613761 + 24342240400 = 424319^2 + 156020^2 .

It is a cyclic number.

It is not a de Polignac number, because 204388854161 - 2² = 204388854157 is a prime.

It is not a weakly prime, because it can be changed into another prime (204388854169) 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, 102194427080 + 102194427081.

It is an arithmetic number, because the mean of its divisors is an integer number (102194427081).

Almost surely, 2^204388854161 is an apocalyptic number.

It is an amenable number.

204388854161 is a deficient number, since it is larger than the sum of its proper divisors (1).

204388854161 is an equidigital number, since it uses as much as digits as its factorization.

204388854161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1474560, while the sum is 50.

The spelling of 204388854161 in words is "two hundred four billion, three hundred eighty-eight million, eight hundred fifty-four thousand, one hundred sixty-one".