12449478413 has 4 divisors (see below), whose sum is σ = 12466234848. Its totient is φ = 12432721980.

The previous prime is 12449478409. The next prime is 12449478443. The reversal of 12449478413 is 31487494421.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 31487494421 = 2203 ⋅14293007.

It is a cyclic number.

It is not a de Polignac number, because 12449478413 - 2² = 12449478409 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12449478443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8377103 + ... + 8378588.

It is an arithmetic number, because the mean of its divisors is an integer number (3116558712).

Almost surely, 2^12449478413 is an apocalyptic number.

It is an amenable number.

12449478413 is a deficient number, since it is larger than the sum of its proper divisors (16756435).

12449478413 is an equidigital number, since it uses as much as digits as its factorization.

12449478413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16756434.

The product of its digits is 774144, while the sum is 47.

The spelling of 12449478413 in words is "twelve billion, four hundred forty-nine million, four hundred seventy-eight thousand, four hundred thirteen".