1271115532549 has 2 divisors, whose sum is σ = 1271115532550. Its totient is φ = 1271115532548.

The previous prime is 1271115532517. The next prime is 1271115532637. The reversal of 1271115532549 is 9452355111721.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1019126592324 + 251988940225 = 1009518^2 + 501985^2 .

It is a cyclic number.

It is not a de Polignac number, because 1271115532549 - 2⁵ = 1271115532517 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1271115532499 and 1271115532508.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1271115532649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 635557766274 + 635557766275.

It is an arithmetic number, because the mean of its divisors is an integer number (635557766275).

Almost surely, 2^{1271115532549} is an apocalyptic number.

It is an amenable number.

1271115532549 is a deficient number, since it is larger than the sum of its proper divisors (1).

1271115532549 is an equidigital number, since it uses as much as digits as its factorization.

1271115532549 is an evil number, because the sum of its binary digits is even.

The product of its digits is 378000, while the sum is 46.

The spelling of 1271115532549 in words is "one trillion, two hundred seventy-one billion, one hundred fifteen million, five hundred thirty-two thousand, five hundred forty-nine".