816473818 has 8 divisors (see below), whose sum is σ = 1225040148. Its totient is φ = 408127104.

The previous prime is 816473813. The next prime is 816473863. The reversal of 816473818 is 818374618.

816473818 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 815844969 + 628849 = 28563^2 + 793^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (816473813) 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, 45271 + ... + 60682.

Almost surely, 2^816473818 is an apocalyptic number.

816473818 is a deficient number, since it is larger than the sum of its proper divisors (408566330).

816473818 is a wasteful number, since it uses less digits than its factorization.

816473818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109808.

The product of its digits is 258048, while the sum is 46.

The square root of 816473818 is about 28574.0059844608. The cubic root of 816473818 is about 934.6465794208.

The spelling of 816473818 in words is "eight hundred sixteen million, four hundred seventy-three thousand, eight hundred eighteen".