27851242427 has 4 divisors (see below), whose sum is σ = 27899512056. Its totient is φ = 27802972800.

The previous prime is 27851242421. The next prime is 27851242499. The reversal of 27851242427 is 72424215872.

It is a happy number.

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 27851242427 - 2²⁰ = 27850193851 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27851242421) 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, 24133949 + ... + 24135102.

It is an arithmetic number, because the mean of its divisors is an integer number (6974878014).

Almost surely, 2^27851242427 is an apocalyptic number.

27851242427 is a deficient number, since it is larger than the sum of its proper divisors (48269629).

27851242427 is an equidigital number, since it uses as much as digits as its factorization.

27851242427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48269628.

The product of its digits is 501760, while the sum is 44.

The spelling of 27851242427 in words is "twenty-seven billion, eight hundred fifty-one million, two hundred forty-two thousand, four hundred twenty-seven".