1604205563 has 2 divisors, whose sum is σ = 1604205564. Its totient is φ = 1604205562.

The previous prime is 1604205529. The next prime is 1604205569. The reversal of 1604205563 is 3655024061.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1604205563 - 2²⁶ = 1537096699 is a prime.

It is not a weakly prime, because it can be changed into another prime (1604205569) 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, 802102781 + 802102782.

It is an arithmetic number, because the mean of its divisors is an integer number (802102782).

Almost surely, 2^1604205563 is an apocalyptic number.

1604205563 is a deficient number, since it is larger than the sum of its proper divisors (1).

1604205563 is an equidigital number, since it uses as much as digits as its factorization.

1604205563 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21600, while the sum is 32.

The square root of 1604205563 is about 40052.5350383718. The cubic root of 1604205563 is about 1170.6309604740.

The spelling of 1604205563 in words is "one billion, six hundred four million, two hundred five thousand, five hundred sixty-three".