27744481819 has 2 divisors, whose sum is σ = 27744481820. Its totient is φ = 27744481818.

The previous prime is 27744481753. The next prime is 27744481823. The reversal of 27744481819 is 91818444772.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 27744481819 - 2⁷ = 27744481691 is a prime.

It is a super-2 number, since 2×27744481819² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 27744481819.

It is not a weakly prime, because it can be changed into another prime (27744481889) 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, 13872240909 + 13872240910.

It is an arithmetic number, because the mean of its divisors is an integer number (13872240910).

Almost surely, 2^27744481819 is an apocalyptic number.

27744481819 is a deficient number, since it is larger than the sum of its proper divisors (1).

27744481819 is an equidigital number, since it uses as much as digits as its factorization.

27744481819 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3612672, while the sum is 55.

The spelling of 27744481819 in words is "twenty-seven billion, seven hundred forty-four million, four hundred eighty-one thousand, eight hundred nineteen".