27775576369 has 2 divisors, whose sum is σ = 27775576370. Its totient is φ = 27775576368.

The previous prime is 27775576351. The next prime is 27775576421. The reversal of 27775576369 is 96367557772.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26240112144 + 1535464225 = 161988^2 + 39185^2 .

It is a cyclic number.

It is not a de Polignac number, because 27775576369 - 2²⁹ = 27238705457 is a prime.

It is a super-2 number, since 2×27775576369² (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 27775576369.

It is not a weakly prime, because it can be changed into another prime (27775576349) 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, 13887788184 + 13887788185.

It is an arithmetic number, because the mean of its divisors is an integer number (13887788185).

Almost surely, 2^27775576369 is an apocalyptic number.

It is an amenable number.

27775576369 is a deficient number, since it is larger than the sum of its proper divisors (1).

27775576369 is an equidigital number, since it uses as much as digits as its factorization.

27775576369 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 116688600, while the sum is 64.

The spelling of 27775576369 in words is "twenty-seven billion, seven hundred seventy-five million, five hundred seventy-six thousand, three hundred sixty-nine".