27455681 has 8 divisors (see below), whose sum is σ = 30042144. Its totient is φ = 24884320.

The previous prime is 27455647. The next prime is 27455707. The reversal of 27455681 is 18655472.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 27455681 - 2¹⁴ = 27439297 is a prime.

It is a super-2 number, since 2×27455681² = 1507628838347522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (27455611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 221 + ... + 7413.

It is an arithmetic number, because the mean of its divisors is an integer number (3755268).

Almost surely, 2^27455681 is an apocalyptic number.

It is an amenable number.

27455681 is a deficient number, since it is larger than the sum of its proper divisors (2586463).

27455681 is a wasteful number, since it uses less digits than its factorization.

27455681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7551.

The product of its digits is 67200, while the sum is 38.

The square root of 27455681 is about 5239.8168861135. The cubic root of 27455681 is about 301.6783009191.

It can be divided in two parts, 274 and 55681, that added together give a palindrome (55955).

The spelling of 27455681 in words is "twenty-seven million, four hundred fifty-five thousand, six hundred eighty-one".