816515169 has 16 divisors (see below), whose sum is σ = 1128873984. Its totient is φ = 524408400.

The previous prime is 816515153. The next prime is 816515171. The reversal of 816515169 is 961515618.

It is not a de Polignac number, because 816515169 - 2⁴ = 816515153 is a prime.

It is a super-2 number, since 2×816515169² = 1333394042414197122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 816515169.

It is not an unprimeable number, because it can be changed into a prime (816515129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1054 + ... + 40424.

It is an arithmetic number, because the mean of its divisors is an integer number (70554624).

Almost surely, 2^816515169 is an apocalyptic number.

It is an amenable number.

816515169 is a deficient number, since it is larger than the sum of its proper divisors (312358815).

816515169 is a wasteful number, since it uses less digits than its factorization.

816515169 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39628.

The product of its digits is 64800, while the sum is 42.

The square root of 816515169 is about 28574.7295525260. The cubic root of 816515169 is about 934.6623578073.

The spelling of 816515169 in words is "eight hundred sixteen million, five hundred fifteen thousand, one hundred sixty-nine".