16443610654423 has 4 divisors (see below), whose sum is σ = 16888032564040. Its totient is φ = 15999188744808.

The previous prime is 16443610654409. The next prime is 16443610654463. The reversal of 16443610654423 is 32445601634461.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16443610654423 is a prime.

It is a super-3 number, since 3×16443610654423³ (a number of 41 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16443610654463) 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, 222210954753 + ... + 222210954826.

It is an arithmetic number, because the mean of its divisors is an integer number (4222008141010).

Almost surely, 2^{16443610654423} is an apocalyptic number.

16443610654423 is a deficient number, since it is larger than the sum of its proper divisors (444421909617).

16443610654423 is an equidigital number, since it uses as much as digits as its factorization.

16443610654423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 444421909616.

The product of its (nonzero) digits is 4976640, while the sum is 49.

The spelling of 16443610654423 in words is "sixteen trillion, four hundred forty-three billion, six hundred ten million, six hundred fifty-four thousand, four hundred twenty-three".