16545720173011 has 4 divisors (see below), whose sum is σ = 17265099310992. Its totient is φ = 15826341035032.

The previous prime is 16545720173009. The next prime is 16545720173033. The reversal of 16545720173011 is 11037102754561.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 16545720173011 - 2¹ = 16545720173009 is a prime.

It is a super-2 number, since 2×16545720173011² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16545720173611) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 359689568956 + ... + 359689569001.

It is an arithmetic number, because the mean of its divisors is an integer number (4316274827748).

Almost surely, 2^{16545720173011} is an apocalyptic number.

16545720173011 is a deficient number, since it is larger than the sum of its proper divisors (719379137981).

16545720173011 is an equidigital number, since it uses as much as digits as its factorization.

16545720173011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 719379137980.

The product of its (nonzero) digits is 176400, while the sum is 43.

The spelling of 16545720173011 in words is "sixteen trillion, five hundred forty-five billion, seven hundred twenty million, one hundred seventy-three thousand, eleven".