12555543043 has 4 divisors (see below), whose sum is σ = 12556255680. Its totient is φ = 12554830408.

The previous prime is 12555543029. The next prime is 12555543047. The reversal of 12555543043 is 34034555521.

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 12555543043 - 2¹³ = 12555534851 is a prime.

It is a super-2 number, since 2×12555543043² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12555542993 and 12555543011.

It is not an unprimeable number, because it can be changed into a prime (12555543047) 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, 329203 + ... + 365356.

It is an arithmetic number, because the mean of its divisors is an integer number (3139063920).

Almost surely, 2^12555543043 is an apocalyptic number.

12555543043 is a deficient number, since it is larger than the sum of its proper divisors (712637).

12555543043 is an equidigital number, since it uses as much as digits as its factorization.

12555543043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 712636.

The product of its (nonzero) digits is 180000, while the sum is 37.

The spelling of 12555543043 in words is "twelve billion, five hundred fifty-five million, five hundred forty-three thousand, forty-three".