12438555142 has 48 divisors (see below), whose sum is σ = 20840637312. Its totient is φ = 5561187840.

The previous prime is 12438555137. The next prime is 12438555149. The reversal of 12438555142 is 24155583421.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 12438555095 and 12438555104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12438555149) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3011883 + ... + 3016009.

It is an arithmetic number, because the mean of its divisors is an integer number (434179944).

Almost surely, 2^12438555142 is an apocalyptic number.

12438555142 is a deficient number, since it is larger than the sum of its proper divisors (8402082170).

12438555142 is a wasteful number, since it uses less digits than its factorization.

12438555142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4433 (or 4420 counting only the distinct ones).

The product of its digits is 192000, while the sum is 40.

The spelling of 12438555142 in words is "twelve billion, four hundred thirty-eight million, five hundred fifty-five thousand, one hundred forty-two".