8812663021549 has 2 divisors, whose sum is σ = 8812663021550. Its totient is φ = 8812663021548.

The previous prime is 8812663021543. The next prime is 8812663021571. The reversal of 8812663021549 is 9451203662188.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8045562060900 + 767100960649 = 2836470^2 + 875843^2 .

It is a cyclic number.

It is not a de Polignac number, because 8812663021549 - 2⁹ = 8812663021037 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 8812663021549.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8812663021543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4406331510774 + 4406331510775.

It is an arithmetic number, because the mean of its divisors is an integer number (4406331510775).

Almost surely, 2^{8812663021549} is an apocalyptic number.

It is an amenable number.

8812663021549 is a deficient number, since it is larger than the sum of its proper divisors (1).

8812663021549 is an equidigital number, since it uses as much as digits as its factorization.

8812663021549 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4976640, while the sum is 55.

The spelling of 8812663021549 in words is "eight trillion, eight hundred twelve billion, six hundred sixty-three million, twenty-one thousand, five hundred forty-nine".