8144904191549 has 2 divisors, whose sum is σ = 8144904191550. Its totient is φ = 8144904191548.

The previous prime is 8144904191461. The next prime is 8144904191551. The reversal of 8144904191549 is 9451914094418.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6830476336324 + 1314427855225 = 2613518^2 + 1146485^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8144904191549 is a prime.

Together with 8144904191551, 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 (8144904191569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4072452095774 + 4072452095775.

It is an arithmetic number, because the mean of its divisors is an integer number (4072452095775).

Almost surely, 2^{8144904191549} is an apocalyptic number.

It is an amenable number.

8144904191549 is a deficient number, since it is larger than the sum of its proper divisors (1).

8144904191549 is an equidigital number, since it uses as much as digits as its factorization.

8144904191549 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7464960, while the sum is 59.

The spelling of 8144904191549 in words is "eight trillion, one hundred forty-four billion, nine hundred four million, one hundred ninety-one thousand, five hundred forty-nine".