27686085085 has 4 divisors (see below), whose sum is σ = 33223302108. Its totient is φ = 22148868064.

The previous prime is 27686085073. The next prime is 27686085103. The reversal of 27686085085 is 58058068672.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5951659609 + 21734425476 = 77147^2 + 147426^2 .

It is a cyclic number.

It is not a de Polignac number, because 27686085085 - 2¹¹ = 27686083037 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2768608504 + ... + 2768608513.

It is an arithmetic number, because the mean of its divisors is an integer number (8305825527).

Almost surely, 2^27686085085 is an apocalyptic number.

It is an amenable number.

27686085085 is a deficient number, since it is larger than the sum of its proper divisors (5537217023).

27686085085 is an equidigital number, since it uses as much as digits as its factorization.

27686085085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5537217022.

The product of its (nonzero) digits is 6451200, while the sum is 55.

The spelling of 27686085085 in words is "twenty-seven billion, six hundred eighty-six million, eighty-five thousand, eighty-five".