27118668541 has 4 divisors (see below), whose sum is σ = 27119314684. Its totient is φ = 27118022400.

The previous prime is 27118668503. The next prime is 27118668571. The reversal of 27118668541 is 14586681172.

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 7137715225 + 19980953316 = 84485^2 + 141354^2 .

It is a cyclic number.

It is not a de Polignac number, because 27118668541 - 2¹⁹ = 27118144253 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 (27118668571) by changing a digit.

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, 255390 + ... + 345631.

It is an arithmetic number, because the mean of its divisors is an integer number (6779828671).

Almost surely, 2^27118668541 is an apocalyptic number.

It is an amenable number.

27118668541 is a deficient number, since it is larger than the sum of its proper divisors (646143).

27118668541 is an equidigital number, since it uses as much as digits as its factorization.

27118668541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 646142.

The product of its digits is 645120, while the sum is 49.

The spelling of 27118668541 in words is "twenty-seven billion, one hundred eighteen million, six hundred sixty-eight thousand, five hundred forty-one".