27418882409 has 2 divisors, whose sum is σ = 27418882410. Its totient is φ = 27418882408.

The previous prime is 27418882367. The next prime is 27418882411. The reversal of 27418882409 is 90428881472.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25445035225 + 1973847184 = 159515^2 + 44428^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27418882409 is a prime.

It is a super-2 number, since 2×27418882409² (a number of 22 digits) contains 22 as substring.

Together with 27418882411, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (27418882499) 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, 13709441204 + 13709441205.

It is an arithmetic number, because the mean of its divisors is an integer number (13709441205).

Almost surely, 2^27418882409 is an apocalyptic number.

It is an amenable number.

27418882409 is a deficient number, since it is larger than the sum of its proper divisors (1).

27418882409 is an equidigital number, since it uses as much as digits as its factorization.

27418882409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2064384, while the sum is 53.

The spelling of 27418882409 in words is "twenty-seven billion, four hundred eighteen million, eight hundred eighty-two thousand, four hundred nine".