27911134871 has 4 divisors (see below), whose sum is σ = 29552966352. Its totient is φ = 26269303392.

The previous prime is 27911134861. The next prime is 27911134891. The reversal of 27911134871 is 17843111972.

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 27911134871 - 2¹⁰ = 27911133847 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 (27911134861) 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, 820915715 + ... + 820915748.

It is an arithmetic number, because the mean of its divisors is an integer number (7388241588).

Almost surely, 2^27911134871 is an apocalyptic number.

27911134871 is a deficient number, since it is larger than the sum of its proper divisors (1641831481).

27911134871 is a wasteful number, since it uses less digits than its factorization.

27911134871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1641831480.

The product of its digits is 84672, while the sum is 44.

The spelling of 27911134871 in words is "twenty-seven billion, nine hundred eleven million, one hundred thirty-four thousand, eight hundred seventy-one".