816320763 has 12 divisors (see below), whose sum is σ = 1179551880. Its totient is φ = 544019136.

The previous prime is 816320759. The next prime is 816320833. The reversal of 816320763 is 367023618.

It is a happy number.

It is not a de Polignac number, because 816320763 - 2² = 816320759 is a prime.

It is not an unprimeable number, because it can be changed into a prime (816320723) 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, 13120 + ... + 42482.

It is an arithmetic number, because the mean of its divisors is an integer number (98295990).

Almost surely, 2^816320763 is an apocalyptic number.

816320763 is a deficient number, since it is larger than the sum of its proper divisors (363231117).

816320763 is a wasteful number, since it uses less digits than its factorization.

816320763 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32458 (or 32455 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 36.

The square root of 816320763 is about 28571.3276380360. The cubic root of 816320763 is about 934.5881732728.

The spelling of 816320763 in words is "eight hundred sixteen million, three hundred twenty thousand, seven hundred sixty-three".