12571277549 has 2 divisors, whose sum is σ = 12571277550. Its totient is φ = 12571277548.

The previous prime is 12571277533. The next prime is 12571277597. The reversal of 12571277549 is 94577217521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11423761924 + 1147515625 = 106882^2 + 33875^2 .

It is an emirp because it is prime and its reverse (94577217521) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12571277549 - 2⁴ = 12571277533 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12571277497 and 12571277506.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12571277149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6285638774 + 6285638775.

It is an arithmetic number, because the mean of its divisors is an integer number (6285638775).

Almost surely, 2^12571277549 is an apocalyptic number.

It is an amenable number.

12571277549 is a deficient number, since it is larger than the sum of its proper divisors (1).

12571277549 is an equidigital number, since it uses as much as digits as its factorization.

12571277549 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1234800, while the sum is 50.

The spelling of 12571277549 in words is "twelve billion, five hundred seventy-one million, two hundred seventy-seven thousand, five hundred forty-nine".