216544041346 has 32 divisors (see below), whose sum is σ = 335193707520. Its totient is φ = 104841406656.

The previous prime is 216544041341. The next prime is 216544041359. The reversal of 216544041346 is 643140445612.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 216544041299 and 216544041308.

It is not an unprimeable number, because it can be changed into a prime (216544041341) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43805751 + ... + 43810693.

It is an arithmetic number, because the mean of its divisors is an integer number (10474803360).

Almost surely, 2^216544041346 is an apocalyptic number.

216544041346 is a deficient number, since it is larger than the sum of its proper divisors (118649666174).

216544041346 is a wasteful number, since it uses less digits than its factorization.

216544041346 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7698.

The product of its (nonzero) digits is 276480, while the sum is 40.

Adding to 216544041346 its reverse (643140445612), we get a palindrome (859684486958).

The spelling of 216544041346 in words is "two hundred sixteen billion, five hundred forty-four million, forty-one thousand, three hundred forty-six".