16644221022453 has 8 divisors (see below), whose sum is σ = 22908175170816. Its totient is φ = 10738207111200.

The previous prime is 16644221022439. The next prime is 16644221022469. The reversal of 16644221022453 is 35422012244661.

16644221022453 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 16644221022453 - 2²² = 16644216828149 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16644221042453) 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, 89485059168 + ... + 89485059353.

It is an arithmetic number, because the mean of its divisors is an integer number (2863521896352).

Almost surely, 2^{16644221022453} is an apocalyptic number.

It is an amenable number.

16644221022453 is a deficient number, since it is larger than the sum of its proper divisors (6263954148363).

16644221022453 is a wasteful number, since it uses less digits than its factorization.

16644221022453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178970118555.

The product of its (nonzero) digits is 552960, while the sum is 42.

The spelling of 16644221022453 in words is "sixteen trillion, six hundred forty-four billion, two hundred twenty-one million, twenty-two thousand, four hundred fifty-three".