218550580163 has 2 divisors, whose sum is σ = 218550580164. Its totient is φ = 218550580162.

The previous prime is 218550580069. The next prime is 218550580207. The reversal of 218550580163 is 361085055812.

It is an a-pointer prime, because the next prime (218550580207) can be obtained adding 218550580163 to its sum of digits (44).

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-218550580163 is a prime.

It is not a weakly prime, because it can be changed into another prime (218550510163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 109275290081 + 109275290082.

It is an arithmetic number, because the mean of its divisors is an integer number (109275290082).

Almost surely, 2^218550580163 is an apocalyptic number.

218550580163 is a deficient number, since it is larger than the sum of its proper divisors (1).

218550580163 is an equidigital number, since it uses as much as digits as its factorization.

218550580163 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288000, while the sum is 44.

The spelling of 218550580163 in words is "two hundred eighteen billion, five hundred fifty million, five hundred eighty thousand, one hundred sixty-three".