6448544005 has 4 divisors (see below), whose sum is σ = 7738252812. Its totient is φ = 5158835200.

The previous prime is 6448543979. The next prime is 6448544009. The reversal of 6448544005 is 5004458446.

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

It can be written as a sum of positive squares in 2 ways, for example, as 3021261156 + 3427282849 = 54966^2 + 58543^2 .

It is not a de Polignac number, because 6448544005 - 2¹³ = 6448535813 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6448544009) 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, 644854396 + ... + 644854405.

It is an arithmetic number, because the mean of its divisors is an integer number (1934563203).

Almost surely, 2^6448544005 is an apocalyptic number.

It is an amenable number.

6448544005 is a deficient number, since it is larger than the sum of its proper divisors (1289708807).

6448544005 is a wasteful number, since it uses less digits than its factorization.

6448544005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1289708806.

The product of its (nonzero) digits is 307200, while the sum is 40.

The square root of 6448544005 is about 80302.8268805028. The cubic root of 6448544005 is about 1861.3179087083.

The spelling of 6448544005 in words is "six billion, four hundred forty-eight million, five hundred forty-four thousand, five".