865499844886 has 4 divisors (see below), whose sum is σ = 1298249767332. Its totient is φ = 432749922442.

The previous prime is 865499844829. The next prime is 865499844929. The reversal of 865499844886 is 688448994568.

It is a happy number.

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 (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 216374961220 + ... + 216374961223.

It is an arithmetic number, because the mean of its divisors is an integer number (324562441833).

Almost surely, 2^865499844886 is an apocalyptic number.

865499844886 is a deficient number, since it is larger than the sum of its proper divisors (432749922446).

865499844886 is a wasteful number, since it uses less digits than its factorization.

865499844886 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 432749922445.

The product of its digits is 3822059520, while the sum is 79.

The spelling of 865499844886 in words is "eight hundred sixty-five billion, four hundred ninety-nine million, eight hundred forty-four thousand, eight hundred eighty-six".