216618018943228 has 48 divisors (see below), whose sum is σ = 434498293462464. Its totient is φ = 92565852825600.

The previous prime is 216618018943199. The next prime is 216618018943241. The reversal of 216618018943228 is 822349810816612.

It is a super-3 number, since 3×216618018943228³ (a number of 44 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Smith number, since the sum of its digits (61) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 122842578 + ... + 124593478.

It is an arithmetic number, because the mean of its divisors is an integer number (9052047780468).

Almost surely, 2^{216618018943228} is an apocalyptic number.

216618018943228 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

216618018943228 is an abundant number, since it is smaller than the sum of its proper divisors (217880274519236).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

216618018943228 is a wasteful number, since it uses less digits than its factorization.

216618018943228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1763782 (or 1763780 counting only the distinct ones).

The product of its (nonzero) digits is 15925248, while the sum is 61.

The spelling of 216618018943228 in words is "two hundred sixteen trillion, six hundred eighteen billion, eighteen million, nine hundred forty-three thousand, two hundred twenty-eight".