27219381391919 has 2 divisors, whose sum is σ = 27219381391920. Its totient is φ = 27219381391918.

The previous prime is 27219381391871. The next prime is 27219381391921. The reversal of 27219381391919 is 91919318391272.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 27219381391919 - 2⁴⁰ = 26119869764143 is a prime.

It is a super-2 number, since 2×27219381391919² (a number of 28 digits) contains 22 as substring.

Together with 27219381391921, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27219381391949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13609690695959 + 13609690695960.

It is an arithmetic number, because the mean of its divisors is an integer number (13609690695960).

Almost surely, 2^{27219381391919} is an apocalyptic number.

27219381391919 is a deficient number, since it is larger than the sum of its proper divisors (1).

27219381391919 is an equidigital number, since it uses as much as digits as its factorization.

27219381391919 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13226976, while the sum is 65.

The spelling of 27219381391919 in words is "twenty-seven trillion, two hundred nineteen billion, three hundred eighty-one million, three hundred ninety-one thousand, nine hundred nineteen".