27012668917 has 4 divisors (see below), whose sum is σ = 29090566540. Its totient is φ = 24934771296.

The previous prime is 27012668911. The next prime is 27012668957. The reversal of 27012668917 is 71986621072.

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 3037552996 + 23975115921 = 55114^2 + 154839^2 .

It is a cyclic number.

It is not a de Polignac number, because 27012668917 - 2²⁷ = 26878451189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27012668911) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1038948792 + ... + 1038948817.

It is an arithmetic number, because the mean of its divisors is an integer number (7272641635).

Almost surely, 2^27012668917 is an apocalyptic number.

It is an amenable number.

27012668917 is a deficient number, since it is larger than the sum of its proper divisors (2077897623).

27012668917 is a wasteful number, since it uses less digits than its factorization.

27012668917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2077897622.

The product of its (nonzero) digits is 508032, while the sum is 49.

The spelling of 27012668917 in words is "twenty-seven billion, twelve million, six hundred sixty-eight thousand, nine hundred seventeen".