6448824643 has 4 divisors (see below), whose sum is σ = 6449016160. Its totient is φ = 6448633128.

The previous prime is 6448824619. The next prime is 6448824673. The reversal of 6448824643 is 3464288446.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 6448824643 - 2⁵ = 6448824611 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6448824673) 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, 30363 + ... + 117556.

It is an arithmetic number, because the mean of its divisors is an integer number (1612254040).

Almost surely, 2^6448824643 is an apocalyptic number.

6448824643 is a deficient number, since it is larger than the sum of its proper divisors (191517).

6448824643 is a wasteful number, since it uses less digits than its factorization.

6448824643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191516.

The product of its digits is 3538944, while the sum is 49.

The square root of 6448824643 is about 80304.5742345976. The cubic root of 6448824643 is about 1861.3449095816.

The spelling of 6448824643 in words is "six billion, four hundred forty-eight million, eight hundred twenty-four thousand, six hundred forty-three".