12640044178 has 16 divisors (see below), whose sum is σ = 19221642144. Its totient is φ = 6233351200.

The previous prime is 12640044173. The next prime is 12640044199. The reversal of 12640044178 is 87144004621.

It is a happy number.

12640044178 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (12640044173) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81523 + ... + 178678.

It is an arithmetic number, because the mean of its divisors is an integer number (1201352634).

Almost surely, 2^12640044178 is an apocalyptic number.

12640044178 is a deficient number, since it is larger than the sum of its proper divisors (6581597966).

12640044178 is a wasteful number, since it uses less digits than its factorization.

12640044178 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 260537.

The product of its (nonzero) digits is 43008, while the sum is 37.

Adding to 12640044178 its reverse (87144004621), we get a palindrome (99784048799).

The spelling of 12640044178 in words is "twelve billion, six hundred forty million, forty-four thousand, one hundred seventy-eight".