86646087818217 has 6 divisors (see below), whose sum is σ = 125155460181882. Its totient is φ = 57764058545472.

The previous prime is 86646087818159. The next prime is 86646087818219. The reversal of 86646087818217 is 71281878064668.

86646087818217 is a `hidden beast` number, since 8 + 6 + 6 + 4 + 608 + 7 + 8 + 1 + 8 + 2 + 1 + 7 = 666.

It can be written as a sum of positive squares in only one way, i.e., 86476999088601 + 169088729616 = 9299301^2 + 411204^2 .

It is not a de Polignac number, because 86646087818217 - 2¹⁶ = 86646087752681 is a prime.

It is not an unprimeable number, because it can be changed into a prime (86646087818219) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4813671545448 + ... + 4813671545465.

It is an arithmetic number, because the mean of its divisors is an integer number (20859243363647).

Almost surely, 2^{86646087818217} is an apocalyptic number.

It is an amenable number.

86646087818217 is a deficient number, since it is larger than the sum of its proper divisors (38509372363665).

86646087818217 is a wasteful number, since it uses less digits than its factorization.

86646087818217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9627343090919 (or 9627343090916 counting only the distinct ones).

The product of its (nonzero) digits is 346816512, while the sum is 72.

The spelling of 86646087818217 in words is "eighty-six trillion, six hundred forty-six billion, eighty-seven million, eight hundred eighteen thousand, two hundred seventeen".