13123405543343 has 4 divisors (see below), whose sum is σ = 13174469378400. Its totient is φ = 13072341708288.

The previous prime is 13123405543331. The next prime is 13123405543349. The reversal of 13123405543343 is 34334550432131.

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

It is a cyclic number.

It is not a de Polignac number, because 13123405543343 - 2⁶ = 13123405543279 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13123405543343.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13123405543349) 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, 25531917143 + ... + 25531917656.

It is an arithmetic number, because the mean of its divisors is an integer number (3293617344600).

Almost surely, 2^{13123405543343} is an apocalyptic number.

13123405543343 is a deficient number, since it is larger than the sum of its proper divisors (51063835057).

13123405543343 is an equidigital number, since it uses as much as digits as its factorization.

13123405543343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51063835056.

The product of its (nonzero) digits is 777600, while the sum is 41.

Adding to 13123405543343 its reverse (34334550432131), we get a palindrome (47457955975474).

The spelling of 13123405543343 in words is "thirteen trillion, one hundred twenty-three billion, four hundred five million, five hundred forty-three thousand, three hundred forty-three".