86820688089 has 12 divisors (see below), whose sum is σ = 125714286100. Its totient is φ = 57738939264.

The previous prime is 86820688063. The next prime is 86820688127. The reversal of 86820688089 is 98088602868.

It can be written as a sum of positive squares in 2 ways, for example, as 76401382464 + 10419305625 = 276408^2 + 102075^2 .

It is not a de Polignac number, because 86820688089 - 2⁵ = 86820688057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (86820618089) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11789404 + ... + 11796765.

Almost surely, 2^86820688089 is an apocalyptic number.

It is an amenable number.

86820688089 is a deficient number, since it is larger than the sum of its proper divisors (38893598011).

86820688089 is a wasteful number, since it uses less digits than its factorization.

86820688089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23586584 (or 23586581 counting only the distinct ones).

The product of its (nonzero) digits is 21233664, while the sum is 63.

The spelling of 86820688089 in words is "eighty-six billion, eight hundred twenty million, six hundred eighty-eight thousand, eighty-nine".