6441056261 has 2 divisors, whose sum is σ = 6441056262. Its totient is φ = 6441056260.

The previous prime is 6441056213. The next prime is 6441056267. The reversal of 6441056261 is 1626501446.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4573952161 + 1867104100 = 67631^2 + 43210^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6441056261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6441056267) 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 as a sum of consecutive naturals, namely, 3220528130 + 3220528131.

It is an arithmetic number, because the mean of its divisors is an integer number (3220528131).

Almost surely, 2^6441056261 is an apocalyptic number.

It is an amenable number.

6441056261 is a deficient number, since it is larger than the sum of its proper divisors (1).

6441056261 is an equidigital number, since it uses as much as digits as its factorization.

6441056261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34560, while the sum is 35.

The square root of 6441056261 is about 80256.1914184819. The cubic root of 6441056261 is about 1860.5972049427.

The spelling of 6441056261 in words is "six billion, four hundred forty-one million, fifty-six thousand, two hundred sixty-one".