12543303644 has 48 divisors (see below), whose sum is σ = 24381907200. Its totient is φ = 5619309696.

The previous prime is 12543303599. The next prime is 12543303683. The reversal of 12543303644 is 44630334521.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 115259 + ... + 195885.

It is an arithmetic number, because the mean of its divisors is an integer number (507956400).

Almost surely, 2^12543303644 is an apocalyptic number.

It is an amenable number.

12543303644 is a deficient number, since it is larger than the sum of its proper divisors (11838603556).

12543303644 is a wasteful number, since it uses less digits than its factorization.

12543303644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80762 (or 80760 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 35.

The spelling of 12543303644 in words is "twelve billion, five hundred forty-three million, three hundred three thousand, six hundred forty-four".