16043121623 has 2 divisors, whose sum is σ = 16043121624. Its totient is φ = 16043121622.

The previous prime is 16043121607. The next prime is 16043121641. The reversal of 16043121623 is 32612134061.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 16043121623 - 2⁴ = 16043121607 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16043121673) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8021560811 + 8021560812.

It is an arithmetic number, because the mean of its divisors is an integer number (8021560812).

Almost surely, 2^16043121623 is an apocalyptic number.

16043121623 is a deficient number, since it is larger than the sum of its proper divisors (1).

16043121623 is an equidigital number, since it uses as much as digits as its factorization.

16043121623 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 29.

Adding to 16043121623 its reverse (32612134061), we get a palindrome (48655255684).

The spelling of 16043121623 in words is "sixteen billion, forty-three million, one hundred twenty-one thousand, six hundred twenty-three".