805851289863 has 32 divisors (see below), whose sum is σ = 1213756600320. Its totient is φ = 528282730080.

The previous prime is 805851289849. The next prime is 805851289879. The reversal of 805851289863 is 368982158508.

805851289863 is a `hidden beast` number, since 8 + 0 + 58 + 512 + 8 + 9 + 8 + 63 = 666.

It is not a de Polignac number, because 805851289863 - 2⁹ = 805851289351 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 805851289863.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (805851289843) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6139306 + ... + 6269192.

It is an arithmetic number, because the mean of its divisors is an integer number (37929893760).

Almost surely, 2^805851289863 is an apocalyptic number.

805851289863 is a deficient number, since it is larger than the sum of its proper divisors (407905310457).

805851289863 is a wasteful number, since it uses less digits than its factorization.

805851289863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133724 (or 133718 counting only the distinct ones).

The product of its (nonzero) digits is 33177600, while the sum is 63.

The spelling of 805851289863 in words is "eight hundred five billion, eight hundred fifty-one million, two hundred eighty-nine thousand, eight hundred sixty-three".