816783502816 has 24 divisors (see below), whose sum is σ = 1609092939384. Its totient is φ = 408124978560.

The previous prime is 816783502793. The next prime is 816783502819. The reversal of 816783502816 is 618205387618.

816783502816 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (816783502819) 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, 8286895 + ... + 8384878.

It is an arithmetic number, because the mean of its divisors is an integer number (67045539141).

Almost surely, 2^816783502816 is an apocalyptic number.

It is an amenable number.

816783502816 is a deficient number, since it is larger than the sum of its proper divisors (792309436568).

816783502816 is a wasteful number, since it uses less digits than its factorization.

816783502816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16673314 (or 16673306 counting only the distinct ones).

The product of its (nonzero) digits is 3870720, while the sum is 55.

The spelling of 816783502816 in words is "eight hundred sixteen billion, seven hundred eighty-three million, five hundred two thousand, eight hundred sixteen".