27816316819 has 2 divisors, whose sum is σ = 27816316820. Its totient is φ = 27816316818.

The previous prime is 27816316807. The next prime is 27816316867. The reversal of 27816316819 is 91861361872.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27816316819 is a prime.

It is a super-2 number, since 2×27816316819² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (27816316919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13908158409 + 13908158410.

It is an arithmetic number, because the mean of its divisors is an integer number (13908158410).

Almost surely, 2^27816316819 is an apocalyptic number.

27816316819 is a deficient number, since it is larger than the sum of its proper divisors (1).

27816316819 is an equidigital number, since it uses as much as digits as its factorization.

27816316819 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 870912, while the sum is 52.

The spelling of 27816316819 in words is "twenty-seven billion, eight hundred sixteen million, three hundred sixteen thousand, eight hundred nineteen".