816716836 has 36 divisors (see below), whose sum is σ = 1589531412. Its totient is φ = 366747264.

The previous prime is 816716833. The next prime is 816716851. The reversal of 816716836 is 638617618.

It can be written as a sum of positive squares in 6 ways, for example, as 37748736 + 778968100 = 6144^2 + 27910^2 .

It is not an unprimeable number, because it can be changed into a prime (816716833) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8686 + ... + 41338.

Almost surely, 2^816716836 is an apocalyptic number.

It is an amenable number.

816716836 is a deficient number, since it is larger than the sum of its proper divisors (772814576).

816716836 is a wasteful number, since it uses less digits than its factorization.

816716836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32720 (or 32705 counting only the distinct ones).

The product of its digits is 290304, while the sum is 46.

The square root of 816716836 is about 28578.2580994714. The cubic root of 816716836 is about 934.7393006676.

The spelling of 816716836 in words is "eight hundred sixteen million, seven hundred sixteen thousand, eight hundred thirty-six".