6441742865 has 8 divisors (see below), whose sum is σ = 7732454400. Its totient is φ = 5151818992.

The previous prime is 6441742859. The next prime is 6441742913. The reversal of 6441742865 is 5682471446.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6441742865 - 2⁴ = 6441742849 is a prime.

It is a super-2 number, since 2×6441742865² = 82992102277556816450, which contains 22 as substring.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 178769 + ... + 211758.

It is an arithmetic number, because the mean of its divisors is an integer number (966556800).

Almost surely, 2^6441742865 is an apocalyptic number.

It is an amenable number.

6441742865 is a deficient number, since it is larger than the sum of its proper divisors (1290711535).

6441742865 is a wasteful number, since it uses less digits than its factorization.

6441742865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 393831.

The product of its digits is 1290240, while the sum is 47.

The square root of 6441742865 is about 80260.4688810127. The cubic root of 6441742865 is about 1860.6633146014.

The spelling of 6441742865 in words is "six billion, four hundred forty-one million, seven hundred forty-two thousand, eight hundred sixty-five".