16544053330121 has 4 divisors (see below), whose sum is σ = 17263359996672. Its totient is φ = 15824746663572.

The previous prime is 16544053330097. The next prime is 16544053330127. The reversal of 16544053330121 is 12103335044561.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16544053330121 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (16544053330127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 359653333241 + ... + 359653333286.

It is an arithmetic number, because the mean of its divisors is an integer number (4315839999168).

Almost surely, 2^{16544053330121} is an apocalyptic number.

It is an amenable number.

16544053330121 is a deficient number, since it is larger than the sum of its proper divisors (719306666551).

16544053330121 is an equidigital number, since it uses as much as digits as its factorization.

16544053330121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 719306666550.

The product of its (nonzero) digits is 129600, while the sum is 38.

Adding to 16544053330121 its reverse (12103335044561), we get a palindrome (28647388374682).

The spelling of 16544053330121 in words is "sixteen trillion, five hundred forty-four billion, fifty-three million, three hundred thirty thousand, one hundred twenty-one".