12438640911 has 16 divisors (see below), whose sum is σ = 17131834368. Its totient is φ = 8019312000.

The previous prime is 12438640901. The next prime is 12438640931. The reversal of 12438640911 is 11904683421.

It is not a de Polignac number, because 12438640911 - 2⁶ = 12438640847 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12438640911.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12438640901) 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, 88855 + ... + 181031.

It is an arithmetic number, because the mean of its divisors is an integer number (1070739648).

Almost surely, 2^12438640911 is an apocalyptic number.

12438640911 is a deficient number, since it is larger than the sum of its proper divisors (4693193457).

12438640911 is a wasteful number, since it uses less digits than its factorization.

12438640911 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93662.

The product of its (nonzero) digits is 41472, while the sum is 39.

The spelling of 12438640911 in words is "twelve billion, four hundred thirty-eight million, six hundred forty thousand, nine hundred eleven".