27775576349 has 2 divisors, whose sum is σ = 27775576350. Its totient is φ = 27775576348.

The previous prime is 27775576291. The next prime is 27775576351. The reversal of 27775576349 is 94367557772.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20324779225 + 7450797124 = 142565^2 + 86318^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27775576349 is a prime.

Together with 27775576351, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 27775576291 and 27775576300.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27775576369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13887788174 + 13887788175.

It is an arithmetic number, because the mean of its divisors is an integer number (13887788175).

Almost surely, 2^27775576349 is an apocalyptic number.

It is an amenable number.

27775576349 is a deficient number, since it is larger than the sum of its proper divisors (1).

27775576349 is an equidigital number, since it uses as much as digits as its factorization.

27775576349 is an evil number, because the sum of its binary digits is even.

The product of its digits is 77792400, while the sum is 62.

The spelling of 27775576349 in words is "twenty-seven billion, seven hundred seventy-five million, five hundred seventy-six thousand, three hundred forty-nine".