816811165 has 8 divisors (see below), whose sum is σ = 980487648. Its totient is φ = 653239440.

The previous prime is 816811111. The next prime is 816811199. The reversal of 816811165 is 561118618.

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

It is not a de Polignac number, because 816811165 - 2¹¹ = 816809117 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, 7867 + ... + 41176.

It is an arithmetic number, because the mean of its divisors is an integer number (122560956).

Almost surely, 2^816811165 is an apocalyptic number.

It is an amenable number.

816811165 is a deficient number, since it is larger than the sum of its proper divisors (163676483).

816811165 is a wasteful number, since it uses less digits than its factorization.

816811165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52379.

The product of its digits is 11520, while the sum is 37.

The square root of 816811165 is about 28579.9084148288. The cubic root of 816811165 is about 934.7752860606.

The spelling of 816811165 in words is "eight hundred sixteen million, eight hundred eleven thousand, one hundred sixty-five".