12446140478 has 8 divisors (see below), whose sum is σ = 18905530080. Its totient is φ = 6144297120.

The previous prime is 12446140439. The next prime is 12446140529. The reversal of 12446140478 is 87404164421.

It is a happy number.

12446140478 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×12446140478² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 39386363 + ... + 39386678.

It is an arithmetic number, because the mean of its divisors is an integer number (2363191260).

Almost surely, 2^12446140478 is an apocalyptic number.

12446140478 is a deficient number, since it is larger than the sum of its proper divisors (6459389602).

12446140478 is an equidigital number, since it uses as much as digits as its factorization.

12446140478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78773122.

The product of its (nonzero) digits is 172032, while the sum is 41.

The spelling of 12446140478 in words is "twelve billion, four hundred forty-six million, one hundred forty thousand, four hundred seventy-eight".