816537316 has 48 divisors (see below), whose sum is σ = 1649846016. Its totient is φ = 346374144.

The previous prime is 816537313. The next prime is 816537343. The reversal of 816537316 is 613735618.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (816537313) 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, 1676425 + ... + 1676911.

It is an arithmetic number, because the mean of its divisors is an integer number (34371792).

Almost surely, 2^816537316 is an apocalyptic number.

It is an amenable number.

816537316 is an abundant number, since it is smaller than the sum of its proper divisors (833308700).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

816537316 is a wasteful number, since it uses less digits than its factorization.

816537316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 988 (or 986 counting only the distinct ones).

The product of its digits is 90720, while the sum is 40.

The square root of 816537316 is about 28575.1170776254. The cubic root of 816537316 is about 934.6708082647.

The spelling of 816537316 in words is "eight hundred sixteen million, five hundred thirty-seven thousand, three hundred sixteen".