6448643219 has 4 divisors (see below), whose sum is σ = 6656664000. Its totient is φ = 6240622440.

The previous prime is 6448643197. The next prime is 6448643233. The reversal of 6448643219 is 9123468446.

6448643219 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9123468446 = 2 ⋅4561734223.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6448643219 is a prime.

It is a super-2 number, since 2×6448643219² = 83169998731909363922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6448643249) 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, 104010344 + ... + 104010405.

It is an arithmetic number, because the mean of its divisors is an integer number (1664166000).

Almost surely, 2^6448643219 is an apocalyptic number.

6448643219 is a deficient number, since it is larger than the sum of its proper divisors (208020781).

6448643219 is a wasteful number, since it uses less digits than its factorization.

6448643219 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208020780.

The product of its digits is 995328, while the sum is 47.

The square root of 6448643219 is about 80303.4446272387. Note that the first 3 decimals coincide. The cubic root of 6448643219 is about 1861.3274544211.

The spelling of 6448643219 in words is "six billion, four hundred forty-eight million, six hundred forty-three thousand, two hundred nineteen".