16555272321303 has 6 divisors (see below), whose sum is σ = 23913171130784. Its totient is φ = 11036848214196.

The previous prime is 16555272321241. The next prime is 16555272321307. The reversal of 16555272321303 is 30312327255561.

16555272321303 is a `hidden beast` number, since 1 + 6 + 5 + 55 + 272 + 3 + 21 + 303 = 666.

It is not a de Polignac number, because 16555272321303 - 2⁹ = 16555272320791 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 (16555272321307) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 919737351175 + ... + 919737351192.

Almost surely, 2^{16555272321303} is an apocalyptic number.

16555272321303 is a deficient number, since it is larger than the sum of its proper divisors (7357898809481).

16555272321303 is a wasteful number, since it uses less digits than its factorization.

16555272321303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1839474702373 (or 1839474702370 counting only the distinct ones).

The product of its (nonzero) digits is 1134000, while the sum is 45.

Adding to 16555272321303 its reverse (30312327255561), we get a palindrome (46867599576864).

The spelling of 16555272321303 in words is "sixteen trillion, five hundred fifty-five billion, two hundred seventy-two million, three hundred twenty-one thousand, three hundred three".