8011989144449 has 2 divisors, whose sum is σ = 8011989144450. Its totient is φ = 8011989144448.

The previous prime is 8011989144427. The next prime is 8011989144451. The reversal of 8011989144449 is 9444419891108.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6865736265025 + 1146252879424 = 2620255^2 + 1070632^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8011989144449 is a prime.

Together with 8011989144451, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 8011989144391 and 8011989144400.

It is not a weakly prime, because it can be changed into another prime (8011989144409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4005994572224 + 4005994572225.

It is an arithmetic number, because the mean of its divisors is an integer number (4005994572225).

Almost surely, 2^{8011989144449} is an apocalyptic number.

It is an amenable number.

8011989144449 is a deficient number, since it is larger than the sum of its proper divisors (1).

8011989144449 is an equidigital number, since it uses as much as digits as its factorization.

8011989144449 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11943936, while the sum is 62.

The spelling of 8011989144449 in words is "eight trillion, eleven billion, nine hundred eighty-nine million, one hundred forty-four thousand, four hundred forty-nine".