27844532369 has 2 divisors, whose sum is σ = 27844532370. Its totient is φ = 27844532368.

The previous prime is 27844532347. The next prime is 27844532399. The reversal of 27844532369 is 96323544872.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25107987025 + 2736545344 = 158455^2 + 52312^2 .

It is a cyclic number.

It is not a de Polignac number, because 27844532369 - 2¹² = 27844528273 is a prime.

It is a super-2 number, since 2×27844532369² (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 27844532369.

It is not a weakly prime, because it can be changed into another prime (27844532329) 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, 13922266184 + 13922266185.

It is an arithmetic number, because the mean of its divisors is an integer number (13922266185).

Almost surely, 2^27844532369 is an apocalyptic number.

It is an amenable number.

27844532369 is a deficient number, since it is larger than the sum of its proper divisors (1).

27844532369 is an equidigital number, since it uses as much as digits as its factorization.

27844532369 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8709120, while the sum is 53.

The spelling of 27844532369 in words is "twenty-seven billion, eight hundred forty-four million, five hundred thirty-two thousand, three hundred sixty-nine".