16520211158017 has 4 divisors (see below), whose sum is σ = 18880241323456. Its totient is φ = 14160180992580.

The previous prime is 16520211157987. The next prime is 16520211158063. The reversal of 16520211158017 is 71085111202561.

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 not a de Polignac number, because 16520211158017 - 2³⁵ = 16485851419649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16520211158917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1180015082709 + ... + 1180015082722.

It is an arithmetic number, because the mean of its divisors is an integer number (4720060330864).

Almost surely, 2^{16520211158017} is an apocalyptic number.

It is an amenable number.

16520211158017 is a deficient number, since it is larger than the sum of its proper divisors (2360030165439).

16520211158017 is an equidigital number, since it uses as much as digits as its factorization.

16520211158017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2360030165438.

The product of its (nonzero) digits is 33600, while the sum is 40.

The spelling of 16520211158017 in words is "sixteen trillion, five hundred twenty billion, two hundred eleven million, one hundred fifty-eight thousand, seventeen".