12543331555 has 32 divisors (see below), whose sum is σ = 16250572800. Its totient is φ = 9263745792.

The previous prime is 12543331547. The next prime is 12543331637. The reversal of 12543331555 is 55513334521.

12543331555 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12543331555 - 2³ = 12543331547 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1863486 + ... + 1870204.

It is an arithmetic number, because the mean of its divisors is an integer number (507830400).

Almost surely, 2^12543331555 is an apocalyptic number.

12543331555 is a deficient number, since it is larger than the sum of its proper divisors (3707241245).

12543331555 is a wasteful number, since it uses less digits than its factorization.

12543331555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7243.

The product of its digits is 135000, while the sum is 37.

The spelling of 12543331555 in words is "twelve billion, five hundred forty-three million, three hundred thirty-one thousand, five hundred fifty-five".