12642532052243 has 4 divisors (see below), whose sum is σ = 12678757072800. Its totient is φ = 12606307031688.

The previous prime is 12642532052233. The next prime is 12642532052299. The reversal of 12642532052243 is 34225023524621.

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 12642532052243 - 2¹² = 12642532048147 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12642532052243.

It is not an unprimeable number, because it can be changed into a prime (12642532052233) 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, 18112509755 + ... + 18112510452.

It is an arithmetic number, because the mean of its divisors is an integer number (3169689268200).

Almost surely, 2^{12642532052243} is an apocalyptic number.

12642532052243 is a deficient number, since it is larger than the sum of its proper divisors (36225020557).

12642532052243 is an equidigital number, since it uses as much as digits as its factorization.

12642532052243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36225020556.

The product of its (nonzero) digits is 691200, while the sum is 41.

Adding to 12642532052243 its reverse (34225023524621), we get a palindrome (46867555576864).

The spelling of 12642532052243 in words is "twelve trillion, six hundred forty-two billion, five hundred thirty-two million, fifty-two thousand, two hundred forty-three".