27661127171 has 4 divisors (see below), whose sum is σ = 27661729200. Its totient is φ = 27660525144.

The previous prime is 27661127129. The next prime is 27661127173. The reversal of 27661127171 is 17172116672.

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 27661127171 - 2⁶ = 27661127107 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27661127173) 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, 225836 + ... + 326073.

It is an arithmetic number, because the mean of its divisors is an integer number (6915432300).

Almost surely, 2^27661127171 is an apocalyptic number.

27661127171 is a deficient number, since it is larger than the sum of its proper divisors (602029).

27661127171 is an equidigital number, since it uses as much as digits as its factorization.

27661127171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 602028.

The product of its digits is 49392, while the sum is 41.

The spelling of 27661127171 in words is "twenty-seven billion, six hundred sixty-one million, one hundred twenty-seven thousand, one hundred seventy-one".