816314161 has 4 divisors (see below), whose sum is σ = 879107572. Its totient is φ = 753520752.

The previous prime is 816314153. The next prime is 816314171. The reversal of 816314161 is 161413618.

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 84070561 + 732243600 = 9169^2 + 27060^2 .

It is a cyclic number.

It is not a de Polignac number, because 816314161 - 2³ = 816314153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (816314101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31396686 + ... + 31396711.

It is an arithmetic number, because the mean of its divisors is an integer number (219776893).

Almost surely, 2^816314161 is an apocalyptic number.

It is an amenable number.

816314161 is a deficient number, since it is larger than the sum of its proper divisors (62793411).

816314161 is a wasteful number, since it uses less digits than its factorization.

816314161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62793410.

The product of its digits is 3456, while the sum is 31.

The square root of 816314161 is about 28571.2121023943. The cubic root of 816314161 is about 934.5856537699.

Adding to 816314161 its reverse (161413618), we get a palindrome (977727779).

The spelling of 816314161 in words is "eight hundred sixteen million, three hundred fourteen thousand, one hundred sixty-one".