12634424138 has 64 divisors (see below), whose sum is σ = 22320230400. Its totient is φ = 5252461440.

The previous prime is 12634424137. The next prime is 12634424161. The reversal of 12634424138 is 83142443621.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (12634424137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 35193203 + ... + 35193561.

It is an arithmetic number, because the mean of its divisors is an integer number (348753600).

Almost surely, 2^12634424138 is an apocalyptic number.

12634424138 is a deficient number, since it is larger than the sum of its proper divisors (9685806262).

12634424138 is a wasteful number, since it uses less digits than its factorization.

12634424138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 875.

The product of its digits is 110592, while the sum is 38.

Adding to 12634424138 its reverse (83142443621), we get a palindrome (95776867759).

The spelling of 12634424138 in words is "twelve billion, six hundred thirty-four million, four hundred twenty-four thousand, one hundred thirty-eight".