816336257 has 8 divisors (see below), whose sum is σ = 890857632. Its totient is φ = 741866400.

The previous prime is 816336251. The next prime is 816336259. The reversal of 816336257 is 752633618.

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

It is not a de Polignac number, because 816336257 - 2⁶ = 816336193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (816336251) 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 7 ways as a sum of consecutive naturals, for example, 25157 + ... + 47597.

It is an arithmetic number, because the mean of its divisors is an integer number (111357204).

Almost surely, 2^816336257 is an apocalyptic number.

It is an amenable number.

816336257 is a deficient number, since it is larger than the sum of its proper divisors (74521375).

816336257 is a wasteful number, since it uses less digits than its factorization.

816336257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25759.

The product of its digits is 181440, while the sum is 41.

The square root of 816336257 is about 28571.5987827073. The cubic root of 816336257 is about 934.5940861518.

The spelling of 816336257 in words is "eight hundred sixteen million, three hundred thirty-six thousand, two hundred fifty-seven".