805606845 has 16 divisors (see below), whose sum is σ = 1305288960. Its totient is φ = 424217664.

The previous prime is 805606843. The next prime is 805606871. The reversal of 805606845 is 548606508.

It is not a de Polignac number, because 805606845 - 2¹ = 805606843 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 805606797 and 805606806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (805606843) 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 in 15 ways as a sum of consecutive naturals, for example, 338734 + ... + 341103.

It is an arithmetic number, because the mean of its divisors is an integer number (81580560).

Almost surely, 2^805606845 is an apocalyptic number.

It is an amenable number.

805606845 is a deficient number, since it is larger than the sum of its proper divisors (499682115).

805606845 is a wasteful number, since it uses less digits than its factorization.

805606845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 679924.

The product of its (nonzero) digits is 230400, while the sum is 42.

The square root of 805606845 is about 28383.2141414604. The cubic root of 805606845 is about 930.4814422491.

The spelling of 805606845 in words is "eight hundred five million, six hundred six thousand, eight hundred forty-five".