6447561214 has 4 divisors (see below), whose sum is σ = 9671341824. Its totient is φ = 3223780606.

The previous prime is 6447561203. The next prime is 6447561223. The reversal of 6447561214 is 4121657446.

6447561214 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

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

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 1611890302 + ... + 1611890305.

It is an arithmetic number, because the mean of its divisors is an integer number (2417835456).

Almost surely, 2^6447561214 is an apocalyptic number.

6447561214 is a deficient number, since it is larger than the sum of its proper divisors (3223780610).

6447561214 is a wasteful number, since it uses less digits than its factorization.

6447561214 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3223780609.

The product of its digits is 161280, while the sum is 40.

The square root of 6447561214 is about 80296.7073671144. The cubic root of 6447561214 is about 1861.2233457896.

The spelling of 6447561214 in words is "six billion, four hundred forty-seven million, five hundred sixty-one thousand, two hundred fourteen".