216542273268472 has 16 divisors (see below), whose sum is σ = 406016918647560. Its totient is φ = 108271094962464.

The previous prime is 216542273268457. The next prime is 216542273268473. The reversal of 216542273268472 is 274862372245612.

It is a super-2 number, since 2×216542273268472² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 216542273268472.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216542273268473) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36890143 + ... + 42355249.

Almost surely, 2^{216542273268472} is an apocalyptic number.

It is an amenable number.

216542273268472 is a deficient number, since it is larger than the sum of its proper divisors (189474645379088).

216542273268472 is a wasteful number, since it uses less digits than its factorization.

216542273268472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10417950 (or 10417946 counting only the distinct ones).

The product of its digits is 108380160, while the sum is 61.

The spelling of 216542273268472 in words is "two hundred sixteen trillion, five hundred forty-two billion, two hundred seventy-three million, two hundred sixty-eight thousand, four hundred seventy-two".