27184640881 has 2 divisors, whose sum is σ = 27184640882. Its totient is φ = 27184640880.

The previous prime is 27184640843. The next prime is 27184640929. The reversal of 27184640881 is 18804648172.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14115578481 + 13069062400 = 118809^2 + 114320^2 .

It is a cyclic number.

It is not a de Polignac number, because 27184640881 - 2¹⁷ = 27184509809 is a prime.

It is a super-2 number, since 2×27184640881² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (27184640081) 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, 13592320440 + 13592320441.

It is an arithmetic number, because the mean of its divisors is an integer number (13592320441).

Almost surely, 2^27184640881 is an apocalyptic number.

It is an amenable number.

27184640881 is a deficient number, since it is larger than the sum of its proper divisors (1).

27184640881 is an equidigital number, since it uses as much as digits as its factorization.

27184640881 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 688128, while the sum is 49.

The spelling of 27184640881 in words is "twenty-seven billion, one hundred eighty-four million, six hundred forty thousand, eight hundred eighty-one".