805594561 has 2 divisors, whose sum is σ = 805594562. Its totient is φ = 805594560.

The previous prime is 805594553. The next prime is 805594577. The reversal of 805594561 is 165495508.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 800890000 + 4704561 = 28300^2 + 2169^2 .

It is a cyclic number.

It is not a de Polignac number, because 805594561 - 2³ = 805594553 is a prime.

It is not a weakly prime, because it can be changed into another prime (805594591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 402797280 + 402797281.

It is an arithmetic number, because the mean of its divisors is an integer number (402797281).

Almost surely, 2^805594561 is an apocalyptic number.

It is an amenable number.

805594561 is a deficient number, since it is larger than the sum of its proper divisors (1).

805594561 is an equidigital number, since it uses as much as digits as its factorization.

805594561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216000, while the sum is 43.

The square root of 805594561 is about 28382.9977451290. The cubic root of 805594561 is about 930.4767128569.

The spelling of 805594561 in words is "eight hundred five million, five hundred ninety-four thousand, five hundred sixty-one".