6489856244447 has 8 divisors (see below), whose sum is σ = 6497288664960. Its totient is φ = 6482424631320.

The previous prime is 6489856244401. The next prime is 6489856244467. The reversal of 6489856244447 is 7444426589846.

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 6489856244447 - 2¹⁸ = 6489855982303 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 (6489856244467) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16690748 + ... + 17075150.

It is an arithmetic number, because the mean of its divisors is an integer number (812161083120).

Almost surely, 2^{6489856244447} is an apocalyptic number.

6489856244447 is a deficient number, since it is larger than the sum of its proper divisors (7432420513).

6489856244447 is a wasteful number, since it uses less digits than its factorization.

6489856244447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 403693.

The product of its digits is 1486356480, while the sum is 71.

The spelling of 6489856244447 in words is "six trillion, four hundred eighty-nine billion, eight hundred fifty-six million, two hundred forty-four thousand, four hundred forty-seven".