27811138927 has 16 divisors (see below), whose sum is σ = 32777666208. Its totient is φ = 23263418880.

The previous prime is 27811138921. The next prime is 27811138951. The reversal of 27811138927 is 72983111872.

It is not a de Polignac number, because 27811138927 - 2⁷ = 27811138799 is a prime.

It is a super-2 number, since 2×27811138927² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27811138921) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 265918 + ... + 355435.

It is an arithmetic number, because the mean of its divisors is an integer number (2048604138).

Almost surely, 2^27811138927 is an apocalyptic number.

27811138927 is a deficient number, since it is larger than the sum of its proper divisors (4966527281).

27811138927 is a wasteful number, since it uses less digits than its factorization.

27811138927 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 621690.

The product of its digits is 338688, while the sum is 49.

The spelling of 27811138927 in words is "twenty-seven billion, eight hundred eleven million, one hundred thirty-eight thousand, nine hundred twenty-seven".