27484855681 has 2 divisors, whose sum is σ = 27484855682. Its totient is φ = 27484855680.

The previous prime is 27484855591. The next prime is 27484855711. The reversal of 27484855681 is 18655848472.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23958396225 + 3526459456 = 154785^2 + 59384^2 .

It is a cyclic number.

It is not a de Polignac number, because 27484855681 - 2²¹ = 27482758529 is a prime.

It is a super-2 number, since 2×27484855681² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (27484850681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13742427840 + 13742427841.

It is an arithmetic number, because the mean of its divisors is an integer number (13742427841).

Almost surely, 2^27484855681 is an apocalyptic number.

It is an amenable number.

27484855681 is a deficient number, since it is larger than the sum of its proper divisors (1).

27484855681 is an equidigital number, since it uses as much as digits as its factorization.

27484855681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17203200, while the sum is 58.

The spelling of 27484855681 in words is "twenty-seven billion, four hundred eighty-four million, eight hundred fifty-five thousand, six hundred eighty-one".