16520813538716 has 24 divisors (see below), whose sum is σ = 30058618901136. Its totient is φ = 7938650839680.

The previous prime is 16520813538707. The next prime is 16520813538769. The reversal of 16520813538716 is 61783531802561.

It is a super-3 number, since 3×16520813538716³ (a number of 41 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (56) coincides with the sum of the digits of its prime factors.

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 7 ways as a sum of consecutive naturals, for example, 751755191 + ... + 751777166.

It is an arithmetic number, because the mean of its divisors is an integer number (1252442454214).

Almost surely, 2^{16520813538716} is an apocalyptic number.

It is an amenable number.

16520813538716 is a deficient number, since it is larger than the sum of its proper divisors (13537805362420).

16520813538716 is a wasteful number, since it uses less digits than its factorization.

16520813538716 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1503532469 (or 1503532467 counting only the distinct ones).

The product of its (nonzero) digits is 7257600, while the sum is 56.

The spelling of 16520813538716 in words is "sixteen trillion, five hundred twenty billion, eight hundred thirteen million, five hundred thirty-eight thousand, seven hundred sixteen".