18027561311863 has 2 divisors, whose sum is σ = 18027561311864. Its totient is φ = 18027561311862.

The previous prime is 18027561311831. The next prime is 18027561311927. The reversal of 18027561311863 is 36811316572081.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18027561311863 - 2⁵ = 18027561311831 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18027561311863.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18027561318863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9013780655931 + 9013780655932.

It is an arithmetic number, because the mean of its divisors is an integer number (9013780655932).

Almost surely, 2^{18027561311863} is an apocalyptic number.

18027561311863 is a deficient number, since it is larger than the sum of its proper divisors (1).

18027561311863 is an equidigital number, since it uses as much as digits as its factorization.

18027561311863 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1451520, while the sum is 52.

The spelling of 18027561311863 in words is "eighteen trillion, twenty-seven billion, five hundred sixty-one million, three hundred eleven thousand, eight hundred sixty-three".