23440216505543 has 2 divisors, whose sum is σ = 23440216505544. Its totient is φ = 23440216505542.

The previous prime is 23440216505521. The next prime is 23440216505567. The reversal of 23440216505543 is 34550561204432.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 23440216505543 - 2³² = 23435921538247 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 23440216505494 and 23440216505503.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23440216505743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11720108252771 + 11720108252772.

It is an arithmetic number, because the mean of its divisors is an integer number (11720108252772).

Almost surely, 2^{23440216505543} is an apocalyptic number.

23440216505543 is a deficient number, since it is larger than the sum of its proper divisors (1).

23440216505543 is an equidigital number, since it uses as much as digits as its factorization.

23440216505543 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728000, while the sum is 44.

Adding to 23440216505543 its reverse (34550561204432), we get a palindrome (57990777709975).

The spelling of 23440216505543 in words is "twenty-three trillion, four hundred forty billion, two hundred sixteen million, five hundred five thousand, five hundred forty-three".