12004145543 has 6 divisors (see below), whose sum is σ = 12998571984. Its totient is φ = 11080749576.

The previous prime is 12004145521. The next prime is 12004145551. The reversal of 12004145543 is 34554140021.

It is not a de Polignac number, because 12004145543 - 2¹⁰ = 12004144519 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12004145513) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 35515055 + ... + 35515392.

It is an arithmetic number, because the mean of its divisors is an integer number (2166428664).

Almost surely, 2^12004145543 is an apocalyptic number.

12004145543 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

12004145543 is a deficient number, since it is larger than the sum of its proper divisors (994426441).

12004145543 is an equidigital number, since it uses as much as digits as its factorization.

12004145543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71030473 (or 71030460 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 29.

Adding to 12004145543 its reverse (34554140021), we get a palindrome (46558285564).

The spelling of 12004145543 in words is "twelve billion, four million, one hundred forty-five thousand, five hundred forty-three".