6445849247 has 4 divisors (see below), whose sum is σ = 6447651840. Its totient is φ = 6444046656.

The previous prime is 6445849231. The next prime is 6445849261. The reversal of 6445849247 is 7429485446.

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 6445849247 - 2⁴ = 6445849231 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 (6445849447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 895922 + ... + 903087.

It is an arithmetic number, because the mean of its divisors is an integer number (1611912960).

Almost surely, 2^6445849247 is an apocalyptic number.

6445849247 is a deficient number, since it is larger than the sum of its proper divisors (1802593).

6445849247 is a wasteful number, since it uses less digits than its factorization.

6445849247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1802592.

The product of its digits is 7741440, while the sum is 53.

The square root of 6445849247 is about 80286.0464028464. The cubic root of 6445849247 is about 1861.0585995184.

The spelling of 6445849247 in words is "six billion, four hundred forty-five million, eight hundred forty-nine thousand, two hundred forty-seven".