12000555543 has 16 divisors (see below), whose sum is σ = 16782842880. Its totient is φ = 7618520736.

The previous prime is 12000555533. The next prime is 12000555551. The reversal of 12000555543 is 34555500021.

It is a happy number.

It is not a de Polignac number, because 12000555543 - 2²² = 11996361239 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12000555543.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12000555533) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1144923 + ... + 1155356.

It is an arithmetic number, because the mean of its divisors is an integer number (1048927680).

Almost surely, 2^12000555543 is an apocalyptic number.

12000555543 is a deficient number, since it is larger than the sum of its proper divisors (4782287337).

12000555543 is a wasteful number, since it uses less digits than its factorization.

12000555543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2300366.

The product of its (nonzero) digits is 15000, while the sum is 30.

The spelling of 12000555543 in words is "twelve billion, five hundred fifty-five thousand, five hundred forty-three".