805381816 has 16 divisors (see below), whose sum is σ = 1523946600. Its totient is φ = 398996064.

The previous prime is 805381813. The next prime is 805381877. The reversal of 805381816 is 618183508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (805381813) 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, 460930 + ... + 462673.

Almost surely, 2^805381816 is an apocalyptic number.

It is an amenable number.

805381816 is a deficient number, since it is larger than the sum of its proper divisors (718564784).

805381816 is a wasteful number, since it uses less digits than its factorization.

805381816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 923718 (or 923714 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 40.

The square root of 805381816 is about 28379.2497434305. The cubic root of 805381816 is about 930.3947975006.

The spelling of 805381816 in words is "eight hundred five million, three hundred eighty-one thousand, eight hundred sixteen".