216243259964944 has 15 divisors (see below), whose sum is σ = 418971430147503. Its totient is φ = 108121600572048.

The previous prime is 216243259964933. The next prime is 216243259964951. The reversal of 216243259964944 is 449469952342612.

The square root of 216243259964944 is 14705212.

It is a perfect power (a square), and thus also a powerful number.

It is a super-3 number, since 3×216243259964944³ (a number of 44 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 56982697 + ... + 60658999.

Almost surely, 2^{216243259964944} is an apocalyptic number.

216243259964944 is the 14705212-nd square number.

It is an amenable number.

216243259964944 is a deficient number, since it is larger than the sum of its proper divisors (202728170182559).

216243259964944 is an frugal number, since it uses more digits than its factorization.

216243259964944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7352614 (or 3676305 counting only the distinct ones).

The product of its digits is 806215680, while the sum is 70.

The spelling of 216243259964944 in words is "two hundred sixteen trillion, two hundred forty-three billion, two hundred fifty-nine million, nine hundred sixty-four thousand, nine hundred forty-four".