27257443423 has 4 divisors (see below), whose sum is σ = 31151363920. Its totient is φ = 23363522928.

The previous prime is 27257443403. The next prime is 27257443441. The reversal of 27257443423 is 32434475272.

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 27257443423 - 2⁹ = 27257442911 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 27257443423.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27257443403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1946960238 + ... + 1946960251.

It is an arithmetic number, because the mean of its divisors is an integer number (7787840980).

Almost surely, 2^27257443423 is an apocalyptic number.

27257443423 is a deficient number, since it is larger than the sum of its proper divisors (3893920497).

27257443423 is an equidigital number, since it uses as much as digits as its factorization.

27257443423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3893920496.

The product of its digits is 1128960, while the sum is 43.

The spelling of 27257443423 in words is "twenty-seven billion, two hundred fifty-seven million, four hundred forty-three thousand, four hundred twenty-three".