16520205520216 has 64 divisors (see below), whose sum is σ = 32974926012000. Its totient is φ = 7736754263040.

The previous prime is 16520205520207. The next prime is 16520205520223. The reversal of 16520205520216 is 61202550202561.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 174693906 + ... + 174788446.

Almost surely, 2^{16520205520216} is an apocalyptic number.

It is an amenable number.

16520205520216 is a deficient number, since it is larger than the sum of its proper divisors (16454720491784).

16520205520216 is a wasteful number, since it uses less digits than its factorization.

16520205520216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107572 (or 107568 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 37.

Adding to 16520205520216 its reverse (61202550202561), we get a palindrome (77722755722777).

The spelling of 16520205520216 in words is "sixteen trillion, five hundred twenty billion, two hundred five million, five hundred twenty thousand, two hundred sixteen".