204166954559 has 2 divisors, whose sum is σ = 204166954560. Its totient is φ = 204166954558.

The previous prime is 204166954543. The next prime is 204166954567. The reversal of 204166954559 is 955459661402.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 204166954559 - 2⁴ = 204166954543 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (204166951559) 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, 102083477279 + 102083477280.

It is an arithmetic number, because the mean of its divisors is an integer number (102083477280).

Almost surely, 2^204166954559 is an apocalyptic number.

204166954559 is a deficient number, since it is larger than the sum of its proper divisors (1).

204166954559 is an equidigital number, since it uses as much as digits as its factorization.

204166954559 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11664000, while the sum is 56.

The spelling of 204166954559 in words is "two hundred four billion, one hundred sixty-six million, nine hundred fifty-four thousand, five hundred fifty-nine".