816279516 has 36 divisors (see below), whose sum is σ = 2222095512. Its totient is φ = 251162784.

The previous prime is 816279511. The next prime is 816279517. The reversal of 816279516 is 615972618.

816279516 is a `hidden beast` number, since 8 + 1 + 62 + 79 + 516 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (816279511) 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, 871626 + ... + 872561.

Almost surely, 2^816279516 is an apocalyptic number.

It is an amenable number.

816279516 is an abundant number, since it is smaller than the sum of its proper divisors (1405815996).

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

816279516 is a wasteful number, since it uses less digits than its factorization.

816279516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1744210 (or 1744205 counting only the distinct ones).

The product of its digits is 181440, while the sum is 45.

The square root of 816279516 is about 28570.6058038677. The cubic root of 816279516 is about 934.5724320718.

It can be divided in two parts, 8162 and 79516, that added together give a palindrome (87678).

The spelling of 816279516 in words is "eight hundred sixteen million, two hundred seventy-nine thousand, five hundred sixteen".