27540665279 has 4 divisors (see below), whose sum is σ = 27557227776. Its totient is φ = 27524102784.

The previous prime is 27540665237. The next prime is 27540665311. The reversal of 27540665279 is 97256604572.

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

It is a cyclic number.

It is not a de Polignac number, because 27540665279 - 2²⁰ = 27539616703 is a prime.

It is a super-2 number, since 2×27540665279² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 27540665279.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27540665209) 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, 8278754 + ... + 8282079.

It is an arithmetic number, because the mean of its divisors is an integer number (6889306944).

Almost surely, 2^27540665279 is an apocalyptic number.

27540665279 is a deficient number, since it is larger than the sum of its proper divisors (16562497).

27540665279 is a wasteful number, since it uses less digits than its factorization.

27540665279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16562496.

The product of its (nonzero) digits is 6350400, while the sum is 53.

The spelling of 27540665279 in words is "twenty-seven billion, five hundred forty million, six hundred sixty-five thousand, two hundred seventy-nine".