12554660549 has 2 divisors, whose sum is σ = 12554660550. Its totient is φ = 12554660548.

The previous prime is 12554660543. The next prime is 12554660551. The reversal of 12554660549 is 94506645521.

12554660549 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7900009924 + 4654650625 = 88882^2 + 68225^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12554660549 is a prime.

Together with 12554660551, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12554660543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6277330274 + 6277330275.

It is an arithmetic number, because the mean of its divisors is an integer number (6277330275).

Almost surely, 2^12554660549 is an apocalyptic number.

It is an amenable number.

12554660549 is a deficient number, since it is larger than the sum of its proper divisors (1).

12554660549 is an equidigital number, since it uses as much as digits as its factorization.

12554660549 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296000, while the sum is 47.

The spelling of 12554660549 in words is "twelve billion, five hundred fifty-four million, six hundred sixty thousand, five hundred forty-nine".