218273719342856 has 16 divisors (see below), whose sum is σ = 409926535322940. Its totient is φ = 108959976590080.

The previous prime is 218273719342817. The next prime is 218273719342871. The reversal of 218273719342856 is 658243917372812.

It can be written as a sum of positive squares in 2 ways, for example, as 153260686022500 + 65013033320356 = 12379850^2 + 8063066^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22110379925 + ... + 22110389796.

Almost surely, 2^{218273719342856} is an apocalyptic number.

It is an amenable number.

218273719342856 is a deficient number, since it is larger than the sum of its proper divisors (191652815980084).

218273719342856 is a wasteful number, since it uses less digits than its factorization.

218273719342856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44220770344 (or 44220770340 counting only the distinct ones).

The product of its digits is 243855360, while the sum is 68.

The spelling of 218273719342856 in words is "two hundred eighteen trillion, two hundred seventy-three billion, seven hundred nineteen million, three hundred forty-two thousand, eight hundred fifty-six".