6448394237 has 4 divisors (see below), whose sum is σ = 6467529276. Its totient is φ = 6429259200.

The previous prime is 6448394233. The next prime is 6448394243. The reversal of 6448394237 is 7324938446.

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 4271145316 + 2177248921 = 65354^2 + 46661^2 .

It is a cyclic number.

It is not a de Polignac number, because 6448394237 - 2² = 6448394233 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 (6448394233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9567014 + ... + 9567687.

It is an arithmetic number, because the mean of its divisors is an integer number (1616882319).

Almost surely, 2^6448394237 is an apocalyptic number.

It is an amenable number.

6448394237 is a deficient number, since it is larger than the sum of its proper divisors (19135039).

6448394237 is a wasteful number, since it uses less digits than its factorization.

6448394237 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19135038.

The product of its digits is 3483648, while the sum is 50.

The square root of 6448394237 is about 80301.8943549902. The cubic root of 6448394237 is about 1861.3034988395.

The spelling of 6448394237 in words is "six billion, four hundred forty-eight million, three hundred ninety-four thousand, two hundred thirty-seven".