6441221767 has 2 divisors, whose sum is σ = 6441221768. Its totient is φ = 6441221766.

The previous prime is 6441221753. The next prime is 6441221779. The reversal of 6441221767 is 7671221446.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6441221767 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6441221467) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3220610883 + 3220610884.

It is an arithmetic number, because the mean of its divisors is an integer number (3220610884).

Almost surely, 2^6441221767 is an apocalyptic number.

6441221767 is a deficient number, since it is larger than the sum of its proper divisors (1).

6441221767 is an equidigital number, since it uses as much as digits as its factorization.

6441221767 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 112896, while the sum is 40.

The square root of 6441221767 is about 80257.2225223375. Note that the first 3 decimals coincide. The cubic root of 6441221767 is about 1860.6131411158.

The spelling of 6441221767 in words is "six billion, four hundred forty-one million, two hundred twenty-one thousand, seven hundred sixty-seven".