845531563 has 2 divisors, whose sum is σ = 845531564. Its totient is φ = 845531562.

The previous prime is 845531539. The next prime is 845531573. The reversal of 845531563 is 365135548.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 845531563 - 2⁹ = 845531051 is a prime.

It is not a weakly prime, because it can be changed into another prime (845531513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 422765781 + 422765782.

It is an arithmetic number, because the mean of its divisors is an integer number (422765782).

Almost surely, 2^845531563 is an apocalyptic number.

845531563 is a deficient number, since it is larger than the sum of its proper divisors (1).

845531563 is an equidigital number, since it uses as much as digits as its factorization.

845531563 is an evil number, because the sum of its binary digits is even.

The product of its digits is 216000, while the sum is 40.

The square root of 845531563 is about 29078.0254315867. The cubic root of 845531563 is about 945.6053950493.

The spelling of 845531563 in words is "eight hundred forty-five million, five hundred thirty-one thousand, five hundred sixty-three".