12540444243 has 8 divisors (see below), whose sum is σ = 16777660368. Its totient is φ = 8331762144.

The previous prime is 12540444209. The next prime is 12540444251. The reversal of 12540444243 is 34244404521.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12540444243 - 2¹⁰ = 12540443219 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12540440243) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7132480 + ... + 7134237.

It is an arithmetic number, because the mean of its divisors is an integer number (2097207546).

Almost surely, 2^12540444243 is an apocalyptic number.

12540444243 is a deficient number, since it is larger than the sum of its proper divisors (4237216125).

12540444243 is a wasteful number, since it uses less digits than its factorization.

12540444243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14267013.

The product of its (nonzero) digits is 61440, while the sum is 33.

Adding to 12540444243 its reverse (34244404521), we get a palindrome (46784848764).

The spelling of 12540444243 in words is "twelve billion, five hundred forty million, four hundred forty-four thousand, two hundred forty-three".