16555220321308 has 48 divisors (see below), whose sum is σ = 31572770695200. Its totient is φ = 7565604076800.

The previous prime is 16555220321303. The next prime is 16555220321357. The reversal of 16555220321308 is 80312302255561.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16555220321303) 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 15 ways as a sum of consecutive naturals, for example, 126543 + ... + 5755558.

It is an arithmetic number, because the mean of its divisors is an integer number (657766056150).

Almost surely, 2^{16555220321308} is an apocalyptic number.

It is an amenable number.

16555220321308 is a deficient number, since it is larger than the sum of its proper divisors (15017550373892).

16555220321308 is a wasteful number, since it uses less digits than its factorization.

16555220321308 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5883430 (or 5883428 counting only the distinct ones).

The product of its (nonzero) digits is 432000, while the sum is 43.

Adding to 16555220321308 its reverse (80312302255561), we get a palindrome (96867522576869).

The spelling of 16555220321308 in words is "sixteen trillion, five hundred fifty-five billion, two hundred twenty million, three hundred twenty-one thousand, three hundred eight".