505545563 has 2 divisors, whose sum is σ = 505545564. Its totient is φ = 505545562.

The previous prime is 505545529. The next prime is 505545587. The reversal of 505545563 is 365545505.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 505545563 - 2¹² = 505541467 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (505544563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252772781 + 252772782.

It is an arithmetic number, because the mean of its divisors is an integer number (252772782).

Almost surely, 2^505545563 is an apocalyptic number.

505545563 is a deficient number, since it is larger than the sum of its proper divisors (1).

505545563 is an equidigital number, since it uses as much as digits as its factorization.

505545563 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 225000, while the sum is 38.

The square root of 505545563 is about 22484.3403950394. The cubic root of 505545563 is about 796.6240881251.

The spelling of 505545563 in words is "five hundred five million, five hundred forty-five thousand, five hundred sixty-three".