27731508449 has 2 divisors, whose sum is σ = 27731508450. Its totient is φ = 27731508448.

The previous prime is 27731508407. The next prime is 27731508499. The reversal of 27731508449 is 94480513772.

It is an a-pointer prime, because the next prime (27731508499) can be obtained adding 27731508449 to its sum of digits (50).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20165988049 + 7565520400 = 142007^2 + 86980^2 .

It is a cyclic number.

It is not a de Polignac number, because 27731508449 - 2⁸ = 27731508193 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 27731508397 and 27731508406.

It is not a weakly prime, because it can be changed into another prime (27731508499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13865754224 + 13865754225.

It is an arithmetic number, because the mean of its divisors is an integer number (13865754225).

Almost surely, 2^27731508449 is an apocalyptic number.

It is an amenable number.

27731508449 is a deficient number, since it is larger than the sum of its proper divisors (1).

27731508449 is an equidigital number, since it uses as much as digits as its factorization.

27731508449 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1693440, while the sum is 50.

The spelling of 27731508449 in words is "twenty-seven billion, seven hundred thirty-one million, five hundred eight thousand, four hundred forty-nine".