6448221436 has 6 divisors (see below), whose sum is σ = 11284387520. Its totient is φ = 3224110716.

The previous prime is 6448221389. The next prime is 6448221443. The reversal of 6448221436 is 6341228446.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 806027676 + ... + 806027683.

Almost surely, 2^6448221436 is an apocalyptic number.

It is an amenable number.

6448221436 is a deficient number, since it is larger than the sum of its proper divisors (4836166084).

6448221436 is a wasteful number, since it uses less digits than its factorization.

6448221436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1612055363 (or 1612055361 counting only the distinct ones).

The product of its digits is 221184, while the sum is 40.

The square root of 6448221436 is about 80300.8184018071. The cubic root of 6448221436 is about 1861.2868725826.

The spelling of 6448221436 in words is "six billion, four hundred forty-eight million, two hundred twenty-one thousand, four hundred thirty-six".