86608722818 has 18 divisors (see below), whose sum is σ = 138015831483. Its totient is φ = 40753716480.

The previous prime is 86608722763. The next prime is 86608722821. The reversal of 86608722818 is 81822780668.

It is a happy number.

It can be written as a sum of positive squares in 5 ways, for example, as 46791313969 + 39817408849 = 216313^2 + 199543^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=208097.

It is a super-2 number, since 2×86608722818² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 7069178 + ... + 7081418.

Almost surely, 2^86608722818 is an apocalyptic number.

86608722818 is a deficient number, since it is larger than the sum of its proper divisors (51407108665).

86608722818 is an frugal number, since it uses more digits than its factorization.

86608722818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24518 (or 12260 counting only the distinct ones).

The product of its (nonzero) digits is 4128768, while the sum is 56.

The spelling of 86608722818 in words is "eighty-six billion, six hundred eight million, seven hundred twenty-two thousand, eight hundred eighteen".