816344845 has 8 divisors (see below), whose sum is σ = 1037238264. Its totient is φ = 614659584.

The previous prime is 816344831. The next prime is 816344939. The reversal of 816344845 is 548443618.

It can be written as a sum of positive squares in 4 ways, for example, as 466430409 + 349914436 = 21597^2 + 18706^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 816344845 - 2⁵ = 816344813 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4801944 + ... + 4802113.

It is an arithmetic number, because the mean of its divisors is an integer number (129654783).

Almost surely, 2^816344845 is an apocalyptic number.

816344845 is a gapful number since it is divisible by the number (85) formed by its first and last digit.

It is an amenable number.

816344845 is a deficient number, since it is larger than the sum of its proper divisors (220893419).

816344845 is a wasteful number, since it uses less digits than its factorization.

816344845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9604079.

The product of its digits is 368640, while the sum is 43.

The square root of 816344845 is about 28571.7490714167. The cubic root of 816344845 is about 934.5973635046.

The spelling of 816344845 in words is "eight hundred sixteen million, three hundred forty-four thousand, eight hundred forty-five".