808536805 has 4 divisors (see below), whose sum is σ = 970244172. Its totient is φ = 646829440.

The previous prime is 808536763. The next prime is 808536863. The reversal of 808536805 is 508635808.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 467986689 + 340550116 = 21633^2 + 18454^2 .

It is not a de Polignac number, because 808536805 - 2²⁹ = 271665893 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 80853676 + ... + 80853685.

It is an arithmetic number, because the mean of its divisors is an integer number (242561043).

Almost surely, 2^808536805 is an apocalyptic number.

It is an amenable number.

808536805 is a deficient number, since it is larger than the sum of its proper divisors (161707367).

808536805 is a wasteful number, since it uses less digits than its factorization.

808536805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161707366.

The product of its (nonzero) digits is 230400, while the sum is 43.

The square root of 808536805 is about 28434.7816063356. The cubic root of 808536805 is about 931.6081187702.

The spelling of 808536805 in words is "eight hundred eight million, five hundred thirty-six thousand, eight hundred five".