805682811 has 4 divisors (see below), whose sum is σ = 1074243752. Its totient is φ = 537121872.

The previous prime is 805682809. The next prime is 805682831. The reversal of 805682811 is 118286508.

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

It is not a de Polignac number, because 805682811 - 2¹ = 805682809 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 805682811.

It is not an unprimeable number, because it can be changed into a prime (805682831) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 134280466 + ... + 134280471.

It is an arithmetic number, because the mean of its divisors is an integer number (268560938).

Almost surely, 2^805682811 is an apocalyptic number.

805682811 is a deficient number, since it is larger than the sum of its proper divisors (268560941).

805682811 is a wasteful number, since it uses less digits than its factorization.

805682811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 268560940.

The product of its (nonzero) digits is 30720, while the sum is 39.

The square root of 805682811 is about 28384.5523304490. The cubic root of 805682811 is about 930.5106884138.

The spelling of 805682811 in words is "eight hundred five million, six hundred eighty-two thousand, eight hundred eleven".