16545520231173 has 16 divisors (see below), whose sum is σ = 24512544770560. Its totient is φ = 11030048494848.

The previous prime is 16545520231127. The next prime is 16545520231189. The reversal of 16545520231173 is 37113202554561.

16545520231173 is a `hidden beast` number, since 1 + 6 + 5 + 4 + 5 + 520 + 2 + 3 + 117 + 3 = 666.

It is not a de Polignac number, because 16545520231173 - 2⁶ = 16545520231109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16545520231673) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7267765 + ... + 9268842.

It is an arithmetic number, because the mean of its divisors is an integer number (1532034048160).

Almost surely, 2^{16545520231173} is an apocalyptic number.

It is an amenable number.

16545520231173 is a deficient number, since it is larger than the sum of its proper divisors (7967024539387).

16545520231173 is a wasteful number, since it uses less digits than its factorization.

16545520231173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16573673 (or 16573667 counting only the distinct ones).

The product of its (nonzero) digits is 756000, while the sum is 45.

The spelling of 16545520231173 in words is "sixteen trillion, five hundred forty-five billion, five hundred twenty million, two hundred thirty-one thousand, one hundred seventy-three".