816024161 has 4 divisors (see below), whose sum is σ = 816090132. Its totient is φ = 815958192.

The previous prime is 816024151. The next prime is 816024169. The reversal of 816024161 is 161420618.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 85673536 + 730350625 = 9256^2 + 27025^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-816024161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (816024169) 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, 8246 + ... + 41231.

It is an arithmetic number, because the mean of its divisors is an integer number (204022533).

It is a Poulet number, since it divides 2^816024160-1.

Almost surely, 2^816024161 is an apocalyptic number.

816024161 is the 16493-rd octagonal number.

It is an amenable number.

816024161 is a deficient number, since it is larger than the sum of its proper divisors (65971).

816024161 is a wasteful number, since it uses less digits than its factorization.

816024161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65970.

The product of its (nonzero) digits is 2304, while the sum is 29.

The square root of 816024161 is about 28566.1366131299. The cubic root of 816024161 is about 934.4749684668.

Adding to 816024161 its reverse (161420618), we get a palindrome (977444779).

The spelling of 816024161 in words is "eight hundred sixteen million, twenty-four thousand, one hundred sixty-one".