16545122330521 has 8 divisors (see below), whose sum is σ = 16771972675304. Its totient is φ = 16318277521920.

The previous prime is 16545122330519. The next prime is 16545122330609. The reversal of 16545122330521 is 12503322154561.

16545122330521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 2468556314896 + 14076566015625 = 1571164^2 + 3751875^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 16545122330521 - 2¹ = 16545122330519 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16545122330501) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4823581 + ... + 7507141.

It is an arithmetic number, because the mean of its divisors is an integer number (2096496584413).

Almost surely, 2^{16545122330521} is an apocalyptic number.

It is an amenable number.

16545122330521 is a deficient number, since it is larger than the sum of its proper divisors (226850344783).

16545122330521 is an equidigital number, since it uses as much as digits as its factorization.

16545122330521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2768091.

The product of its (nonzero) digits is 216000, while the sum is 40.

The spelling of 16545122330521 in words is "sixteen trillion, five hundred forty-five billion, one hundred twenty-two million, three hundred thirty thousand, five hundred twenty-one".