805664200918 has 4 divisors (see below), whose sum is σ = 1208496301380. Its totient is φ = 402832100458.

The previous prime is 805664200879. The next prime is 805664200933. The reversal of 805664200918 is 819002466508.

805664200918 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 polite number, since it can be written as a sum of consecutive naturals, namely, 201416050228 + ... + 201416050231.

It is an arithmetic number, because the mean of its divisors is an integer number (302124075345).

Almost surely, 2^805664200918 is an apocalyptic number.

805664200918 is a deficient number, since it is larger than the sum of its proper divisors (402832100462).

805664200918 is a wasteful number, since it uses less digits than its factorization.

805664200918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 402832100461.

The product of its (nonzero) digits is 829440, while the sum is 49.

The spelling of 805664200918 in words is "eight hundred five billion, six hundred sixty-four million, two hundred thousand, nine hundred eighteen".