805051137806 has 4 divisors (see below), whose sum is σ = 1207576706712. Its totient is φ = 402525568902.

The previous prime is 805051137797. The next prime is 805051137829. The reversal of 805051137806 is 608731150508.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201262784450 + ... + 201262784453.

It is an arithmetic number, because the mean of its divisors is an integer number (301894176678).

Almost surely, 2^805051137806 is an apocalyptic number.

805051137806 is a deficient number, since it is larger than the sum of its proper divisors (402525568906).

805051137806 is a wasteful number, since it uses less digits than its factorization.

805051137806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 402525568905.

The product of its (nonzero) digits is 201600, while the sum is 44.

The spelling of 805051137806 in words is "eight hundred five billion, fifty-one million, one hundred thirty-seven thousand, eight hundred six".