6448442473 has 12 divisors (see below), whose sum is σ = 7279528900. Its totient is φ = 5703778080.

The previous prime is 6448442461. The next prime is 6448442477. The reversal of 6448442473 is 3742448446.

It can be written as a sum of positive squares in 2 ways, for example, as 4851401104 + 1597041369 = 69652^2 + 39963^2 .

It is a de Polignac number, because none of the positive numbers 2^k-6448442473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6448442477) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 715698 + ... + 724651.

Almost surely, 2^6448442473 is an apocalyptic number.

It is an amenable number.

6448442473 is a deficient number, since it is larger than the sum of its proper divisors (831086427).

6448442473 is a wasteful number, since it uses less digits than its factorization.

6448442473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1440408 (or 1440397 counting only the distinct ones).

The product of its digits is 2064384, while the sum is 46.

The square root of 6448442473 is about 80302.1946960355. The cubic root of 6448442473 is about 1861.3081398715.

The spelling of 6448442473 in words is "six billion, four hundred forty-eight million, four hundred forty-two thousand, four hundred seventy-three".