12440330243 has 16 divisors (see below), whose sum is σ = 13765669632. Its totient is φ = 11148540000.

The previous prime is 12440330239. The next prime is 12440330269. The reversal of 12440330243 is 34203304421.

It is a cyclic number.

It is not a de Polignac number, because 12440330243 - 2² = 12440330239 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12440330543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 189005 + ... + 246177.

It is an arithmetic number, because the mean of its divisors is an integer number (860354352).

Almost surely, 2^12440330243 is an apocalyptic number.

12440330243 is a deficient number, since it is larger than the sum of its proper divisors (1325339389).

12440330243 is a wasteful number, since it uses less digits than its factorization.

12440330243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57466.

The product of its (nonzero) digits is 6912, while the sum is 26.

Adding to 12440330243 its reverse (34203304421), we get a palindrome (46643634664).

The spelling of 12440330243 in words is "twelve billion, four hundred forty million, three hundred thirty thousand, two hundred forty-three".