27548224681 has 4 divisors (see below), whose sum is σ = 28292771332. Its totient is φ = 26803678032.

The previous prime is 27548224559. The next prime is 27548224699. The reversal of 27548224681 is 18642284572.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 23689827225 + 3858397456 = 153915^2 + 62116^2 .

It is a cyclic number.

It is not a de Polignac number, because 27548224681 - 2⁹ = 27548224169 is a prime.

It is a super-3 number, since 3×27548224681³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27548224181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 372273270 + ... + 372273343.

It is an arithmetic number, because the mean of its divisors is an integer number (7073192833).

Almost surely, 2^27548224681 is an apocalyptic number.

It is an amenable number.

27548224681 is a deficient number, since it is larger than the sum of its proper divisors (744546651).

27548224681 is an equidigital number, since it uses as much as digits as its factorization.

27548224681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 744546650.

The product of its digits is 1720320, while the sum is 49.

The spelling of 27548224681 in words is "twenty-seven billion, five hundred forty-eight million, two hundred twenty-four thousand, six hundred eighty-one".