205041616643 has 2 divisors, whose sum is σ = 205041616644. Its totient is φ = 205041616642.

The previous prime is 205041616573. The next prime is 205041616657. The reversal of 205041616643 is 346616140502.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 205041616643 - 2²⁰ = 205040568067 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 205041616597 and 205041616606.

It is not a weakly prime, because it can be changed into another prime (205041616543) 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, 102520808321 + 102520808322.

It is an arithmetic number, because the mean of its divisors is an integer number (102520808322).

Almost surely, 2^205041616643 is an apocalyptic number.

205041616643 is a deficient number, since it is larger than the sum of its proper divisors (1).

205041616643 is an equidigital number, since it uses as much as digits as its factorization.

205041616643 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 103680, while the sum is 38.

The spelling of 205041616643 in words is "two hundred five billion, forty-one million, six hundred sixteen thousand, six hundred forty-three".