675128066549 has 2 divisors, whose sum is σ = 675128066550. Its totient is φ = 675128066548.

The previous prime is 675128066539. The next prime is 675128066563. The reversal of 675128066549 is 945660821576.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 535545876100 + 139582190449 = 731810^2 + 373607^2 .

It is a cyclic number.

It is not a de Polignac number, because 675128066549 - 2⁴ = 675128066533 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (675128066539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 337564033274 + 337564033275.

It is an arithmetic number, because the mean of its divisors is an integer number (337564033275).

Almost surely, 2^675128066549 is an apocalyptic number.

It is an amenable number.

675128066549 is a deficient number, since it is larger than the sum of its proper divisors (1).

675128066549 is an equidigital number, since it uses as much as digits as its factorization.

675128066549 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21772800, while the sum is 59.

The spelling of 675128066549 in words is "six hundred seventy-five billion, one hundred twenty-eight million, sixty-six thousand, five hundred forty-nine".