6441961087 has 4 divisors (see below), whose sum is σ = 6519575160. Its totient is φ = 6364347016.

The previous prime is 6441961073. The next prime is 6441961111. The reversal of 6441961087 is 7801691446.

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

It is a cyclic number.

It is not a de Polignac number, because 6441961087 - 2²³ = 6433572479 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6441961007) 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 in 3 ways as a sum of consecutive naturals, for example, 38806912 + ... + 38807077.

It is an arithmetic number, because the mean of its divisors is an integer number (1629893790).

Almost surely, 2^6441961087 is an apocalyptic number.

6441961087 is a deficient number, since it is larger than the sum of its proper divisors (77614073).

6441961087 is an equidigital number, since it uses as much as digits as its factorization.

6441961087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77614072.

The product of its (nonzero) digits is 290304, while the sum is 46.

The square root of 6441961087 is about 80261.8283307825. The cubic root of 6441961087 is about 1860.6843251205.

The spelling of 6441961087 in words is "six billion, four hundred forty-one million, nine hundred sixty-one thousand, eighty-seven".