16555220321323 has 8 divisors (see below), whose sum is σ = 16692512958576. Its totient is φ = 16418493840000.

The previous prime is 16555220321303. The next prime is 16555220321357. The reversal of 16555220321323 is 32312302255561.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 16555220321323 - 2⁹ = 16555220320811 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16555220321303) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 141480258 + ... + 141597223.

It is an arithmetic number, because the mean of its divisors is an integer number (2086564119822).

Almost surely, 2^{16555220321323} is an apocalyptic number.

16555220321323 is a deficient number, since it is larger than the sum of its proper divisors (137292637253).

16555220321323 is a wasteful number, since it uses less digits than its factorization.

16555220321323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 283077965.

The product of its (nonzero) digits is 324000, while the sum is 40.

Adding to 16555220321323 its reverse (32312302255561), we get a palindrome (48867522576884).

The spelling of 16555220321323 in words is "sixteen trillion, five hundred fifty-five billion, two hundred twenty million, three hundred twenty-one thousand, three hundred twenty-three".