816075481 has 12 divisors (see below), whose sum is σ = 889336812. Its totient is φ = 748478016.

The previous prime is 816075473. The next prime is 816075509. The reversal of 816075481 is 184570618.

It can be written as a sum of positive squares in 6 ways, for example, as 215825481 + 600250000 = 14691^2 + 24500^2 .

It is not a de Polignac number, because 816075481 - 2³ = 816075473 is a prime.

It is a super-2 number, since 2×816075481² = 1331958381378762722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (816075401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11155 + ... + 41911.

It is an arithmetic number, because the mean of its divisors is an integer number (74111401).

Almost surely, 2^816075481 is an apocalyptic number.

It is an amenable number.

816075481 is a deficient number, since it is larger than the sum of its proper divisors (73261331).

816075481 is a wasteful number, since it uses less digits than its factorization.

816075481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30940 (or 30927 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 40.

The square root of 816075481 is about 28567.0348653829. The cubic root of 816075481 is about 934.4945578582.

The spelling of 816075481 in words is "eight hundred sixteen million, seventy-five thousand, four hundred eighty-one".