86564885789 has 2 divisors, whose sum is σ = 86564885790. Its totient is φ = 86564885788.

The previous prime is 86564885783. The next prime is 86564885809. The reversal of 86564885789 is 98758846568.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 86357813689 + 207072100 = 293867^2 + 14390^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-86564885789 is a prime.

It is a super-2 number, since 2×86564885789² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86564885783) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43282442894 + 43282442895.

It is an arithmetic number, because the mean of its divisors is an integer number (43282442895).

Almost surely, 2^86564885789 is an apocalyptic number.

It is an amenable number.

86564885789 is a deficient number, since it is larger than the sum of its proper divisors (1).

86564885789 is an equidigital number, since it uses as much as digits as its factorization.

86564885789 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 928972800, while the sum is 74.

The spelling of 86564885789 in words is "eighty-six billion, five hundred sixty-four million, eight hundred eighty-five thousand, seven hundred eighty-nine".