6441962509 has 2 divisors, whose sum is σ = 6441962510. Its totient is φ = 6441962508.

The previous prime is 6441962503. The next prime is 6441962537. The reversal of 6441962509 is 9052691446.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3277562500 + 3164400009 = 57250^2 + 56253^2 .

It is a cyclic number.

It is not a de Polignac number, because 6441962509 - 2⁵ = 6441962477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6441962503) 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, 3220981254 + 3220981255.

It is an arithmetic number, because the mean of its divisors is an integer number (3220981255).

Almost surely, 2^6441962509 is an apocalyptic number.

It is an amenable number.

6441962509 is a deficient number, since it is larger than the sum of its proper divisors (1).

6441962509 is an equidigital number, since it uses as much as digits as its factorization.

6441962509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 466560, while the sum is 46.

The square root of 6441962509 is about 80261.8371892894. The cubic root of 6441962509 is about 1860.6844620298.

The spelling of 6441962509 in words is "six billion, four hundred forty-one million, nine hundred sixty-two thousand, five hundred nine".