816391359 has 16 divisors (see below), whose sum is σ = 1382250240. Its totient is φ = 466509240.

The previous prime is 816391349. The next prime is 816391379. The reversal of 816391359 is 953193618.

816391359 is a `hidden beast` number, since 8 + 1 + 639 + 1 + 3 + 5 + 9 = 666.

816391359 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 816391359 - 2¹⁵ = 816358591 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (816391349) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2159577 + ... + 2159954.

It is an arithmetic number, because the mean of its divisors is an integer number (86390640).

Almost surely, 2^816391359 is an apocalyptic number.

816391359 is a deficient number, since it is larger than the sum of its proper divisors (565858881).

816391359 is a wasteful number, since it uses less digits than its factorization.

816391359 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4319547 (or 4319541 counting only the distinct ones).

The product of its digits is 174960, while the sum is 45.

The square root of 816391359 is about 28572.5630456912. The cubic root of 816391359 is about 934.6151137795.

The spelling of 816391359 in words is "eight hundred sixteen million, three hundred ninety-one thousand, three hundred fifty-nine".