27771423143 has 4 divisors (see below), whose sum is σ = 27772091760. Its totient is φ = 27770754528.

The previous prime is 27771423139. The next prime is 27771423157. The reversal of 27771423143 is 34132417772.

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 27771423143 - 2² = 27771423139 is a prime.

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 27771423143.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27771483143) 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, 267563 + ... + 356556.

It is an arithmetic number, because the mean of its divisors is an integer number (6943022940).

Almost surely, 2^27771423143 is an apocalyptic number.

27771423143 is a deficient number, since it is larger than the sum of its proper divisors (668617).

27771423143 is an equidigital number, since it uses as much as digits as its factorization.

27771423143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 668616.

The product of its digits is 197568, while the sum is 41.

The spelling of 27771423143 in words is "twenty-seven billion, seven hundred seventy-one million, four hundred twenty-three thousand, one hundred forty-three".