8811187855649 has 2 divisors, whose sum is σ = 8811187855650. Its totient is φ = 8811187855648.

The previous prime is 8811187855633. The next prime is 8811187855651. The reversal of 8811187855649 is 9465587811188.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8811060165649 + 127690000 = 2968343^2 + 11300^2 .

It is a cyclic number.

It is not a de Polignac number, because 8811187855649 - 2⁴ = 8811187855633 is a prime.

It is a super-2 number, since 2×8811187855649² (a number of 27 digits) contains 22 as substring.

Together with 8811187855651, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (8811187875649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4405593927824 + 4405593927825.

It is an arithmetic number, because the mean of its divisors is an integer number (4405593927825).

Almost surely, 2^{8811187855649} is an apocalyptic number.

It is an amenable number.

8811187855649 is a deficient number, since it is larger than the sum of its proper divisors (1).

8811187855649 is an equidigital number, since it uses as much as digits as its factorization.

8811187855649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 154828800, while the sum is 71.

The spelling of 8811187855649 in words is "eight trillion, eight hundred eleven billion, one hundred eighty-seven million, eight hundred fifty-five thousand, six hundred forty-nine".