12449374919 has 4 divisors (see below), whose sum is σ = 12480733944. Its totient is φ = 12418015896.

The previous prime is 12449374901. The next prime is 12449374943. The reversal of 12449374919 is 91947394421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 91947394421 = 337 ⋅272840933.

It is a cyclic number.

It is not a de Polignac number, because 12449374919 - 2²⁴ = 12432597703 is a prime.

It is a super-2 number, since 2×12449374919² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12449374969) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15678917 + ... + 15679710.

It is an arithmetic number, because the mean of its divisors is an integer number (3120183486).

Almost surely, 2^12449374919 is an apocalyptic number.

12449374919 is a deficient number, since it is larger than the sum of its proper divisors (31359025).

12449374919 is an equidigital number, since it uses as much as digits as its factorization.

12449374919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31359024.

The product of its digits is 1959552, while the sum is 53.

The spelling of 12449374919 in words is "twelve billion, four hundred forty-nine million, three hundred seventy-four thousand, nine hundred nineteen".