218563090453 has 2 divisors, whose sum is σ = 218563090454. Its totient is φ = 218563090452.

The previous prime is 218563090451. The next prime is 218563090513. The reversal of 218563090453 is 354090365812.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 129641043249 + 88922047204 = 360057^2 + 298198^2 .

It is a cyclic number.

It is not a de Polignac number, because 218563090453 - 2¹ = 218563090451 is a prime.

Together with 218563090451, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (218563090451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 109281545226 + 109281545227.

It is an arithmetic number, because the mean of its divisors is an integer number (109281545227).

Almost surely, 2^218563090453 is an apocalyptic number.

It is an amenable number.

218563090453 is a deficient number, since it is larger than the sum of its proper divisors (1).

218563090453 is an equidigital number, since it uses as much as digits as its factorization.

218563090453 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 777600, while the sum is 46.

The spelling of 218563090453 in words is "two hundred eighteen billion, five hundred sixty-three million, ninety thousand, four hundred fifty-three".