16730517130521 has 4 divisors (see below), whose sum is σ = 22307356174032. Its totient is φ = 11153678087012.

The previous prime is 16730517130487. The next prime is 16730517130571. The reversal of 16730517130521 is 12503171503761.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 16730517130521 - 2⁹ = 16730517130009 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16730517130571) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 2788419521751 + ... + 2788419521756.

It is an arithmetic number, because the mean of its divisors is an integer number (5576839043508).

Almost surely, 2^{16730517130521} is an apocalyptic number.

It is an amenable number.

16730517130521 is a deficient number, since it is larger than the sum of its proper divisors (5576839043511).

16730517130521 is an equidigital number, since it uses as much as digits as its factorization.

16730517130521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5576839043510.

The product of its (nonzero) digits is 132300, while the sum is 42.

The spelling of 16730517130521 in words is "sixteen trillion, seven hundred thirty billion, five hundred seventeen million, one hundred thirty thousand, five hundred twenty-one".