816368485 has 4 divisors (see below), whose sum is σ = 979642188. Its totient is φ = 653094784.

The previous prime is 816368453. The next prime is 816368503. The reversal of 816368485 is 584863618.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 492440481 + 323928004 = 22191^2 + 17998^2 .

It is a cyclic number.

It is not a de Polignac number, because 816368485 - 2⁵ = 816368453 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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 3 ways as a sum of consecutive naturals, for example, 81636844 + ... + 81636853.

It is an arithmetic number, because the mean of its divisors is an integer number (244910547).

Almost surely, 2^816368485 is an apocalyptic number.

It is an amenable number.

816368485 is a deficient number, since it is larger than the sum of its proper divisors (163273703).

816368485 is a wasteful number, since it uses less digits than its factorization.

816368485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163273702.

The product of its digits is 1105920, while the sum is 49.

The square root of 816368485 is about 28572.1627637811. The cubic root of 816368485 is about 934.6063848835.

The spelling of 816368485 in words is "eight hundred sixteen million, three hundred sixty-eight thousand, four hundred eighty-five".