16545720173155 has 4 divisors (see below), whose sum is σ = 19854864207792. Its totient is φ = 13236576138520.

The previous prime is 16545720173113. The next prime is 16545720173159. The reversal of 16545720173155 is 55137102754561.

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

It is not a de Polignac number, because 16545720173155 - 2¹¹ = 16545720171107 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16545720173159) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1654572017311 + ... + 1654572017320.

It is an arithmetic number, because the mean of its divisors is an integer number (4963716051948).

Almost surely, 2^{16545720173155} is an apocalyptic number.

16545720173155 is a deficient number, since it is larger than the sum of its proper divisors (3309144034637).

16545720173155 is an equidigital number, since it uses as much as digits as its factorization.

16545720173155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3309144034636.

The product of its (nonzero) digits is 4410000, while the sum is 52.

The spelling of 16545720173155 in words is "sixteen trillion, five hundred forty-five billion, seven hundred twenty million, one hundred seventy-three thousand, one hundred fifty-five".