816444799 has 8 divisors (see below), whose sum is σ = 844236288. Its totient is φ = 788744280.

The previous prime is 816444791. The next prime is 816444809. The reversal of 816444799 is 997444618.

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

It is a cyclic number.

It is not a de Polignac number, because 816444799 - 2³ = 816444791 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (816444791) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4237 + ... + 40630.

It is an arithmetic number, because the mean of its divisors is an integer number (105529536).

Almost surely, 2^816444799 is an apocalyptic number.

816444799 is a deficient number, since it is larger than the sum of its proper divisors (27791489).

816444799 is a wasteful number, since it uses less digits than its factorization.

816444799 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45485.

The product of its digits is 1741824, while the sum is 52.

The square root of 816444799 is about 28573.4981932559. The cubic root of 816444799 is about 934.6355062630.

The spelling of 816444799 in words is "eight hundred sixteen million, four hundred forty-four thousand, seven hundred ninety-nine".