12543303657 has 16 divisors (see below), whose sum is σ = 16852582080. Its totient is φ = 8298158592.

The previous prime is 12543303599. The next prime is 12543303683. The reversal of 12543303657 is 75630334521.

It is not a de Polignac number, because 12543303657 - 2¹¹ = 12543301609 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12543303697) 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, 2213694 + ... + 2219352.

It is an arithmetic number, because the mean of its divisors is an integer number (1053286380).

Almost surely, 2^12543303657 is an apocalyptic number.

It is an amenable number.

12543303657 is a deficient number, since it is larger than the sum of its proper divisors (4309278423).

12543303657 is a wasteful number, since it uses less digits than its factorization.

12543303657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11192.

The product of its (nonzero) digits is 226800, while the sum is 39.

The spelling of 12543303657 in words is "twelve billion, five hundred forty-three million, three hundred three thousand, six hundred fifty-seven".