6448071647 has 2 divisors, whose sum is σ = 6448071648. Its totient is φ = 6448071646.

The previous prime is 6448071607. The next prime is 6448071683. The reversal of 6448071647 is 7461708446.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6448071647 - 2⁶ = 6448071583 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6448071607) 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 as a sum of consecutive naturals, namely, 3224035823 + 3224035824.

It is an arithmetic number, because the mean of its divisors is an integer number (3224035824).

Almost surely, 2^6448071647 is an apocalyptic number.

6448071647 is a deficient number, since it is larger than the sum of its proper divisors (1).

6448071647 is an equidigital number, since it uses as much as digits as its factorization.

6448071647 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 903168, while the sum is 47.

The square root of 6448071647 is about 80299.8857222101. The cubic root of 6448071647 is about 1861.2724602126.

The spelling of 6448071647 in words is "six billion, four hundred forty-eight million, seventy-one thousand, six hundred forty-seven".