816089616968 has 16 divisors (see below), whose sum is σ = 1530245965500. Its totient is φ = 408024026176.

The previous prime is 816089616967. The next prime is 816089617009. The reversal of 816089616968 is 869616980618.

It can be written as a sum of positive squares in 2 ways, for example, as 802024131364 + 14065485604 = 895558^2 + 118598^2 .

It is a junction number, because it is equal to n+sod(n) for n = 816089616898 and 816089616907.

It is not an unprimeable number, because it can be changed into a prime (816089616961) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2430263 + ... + 2745606.

Almost surely, 2^816089616968 is an apocalyptic number.

It is an amenable number.

816089616968 is a deficient number, since it is larger than the sum of its proper divisors (714156348532).

816089616968 is a wasteful number, since it uses less digits than its factorization.

816089616968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5195584 (or 5195580 counting only the distinct ones).

The product of its (nonzero) digits is 53747712, while the sum is 68.

The spelling of 816089616968 in words is "eight hundred sixteen billion, eighty-nine million, six hundred sixteen thousand, nine hundred sixty-eight".