816860712897 has 24 divisors (see below), whose sum is σ = 1186580304000. Its totient is φ = 541498592448.

The previous prime is 816860712851. The next prime is 816860712961. The reversal of 816860712897 is 798217068618.

816860712897 is a `hidden beast` number, since 8 + 1 + 6 + 8 + 607 + 12 + 8 + 9 + 7 = 666.

816860712897 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 816860712897 - 2⁷ = 816860712769 is a prime.

It is a super-2 number, since 2×816860712897² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (816860712497) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2739988 + ... + 3023450.

It is an arithmetic number, because the mean of its divisors is an integer number (49440846000).

Almost surely, 2^816860712897 is an apocalyptic number.

It is an amenable number.

816860712897 is a deficient number, since it is larger than the sum of its proper divisors (369719591103).

816860712897 is a wasteful number, since it uses less digits than its factorization.

816860712897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285277 (or 285274 counting only the distinct ones).

The product of its (nonzero) digits is 16257024, while the sum is 63.

The spelling of 816860712897 in words is "eight hundred sixteen billion, eight hundred sixty million, seven hundred twelve thousand, eight hundred ninety-seven".