6505869371808 has 24 divisors (see below), whose sum is σ = 17077907101248. Its totient is φ = 2168623123904.

The previous prime is 6505869371761. The next prime is 6505869371809. The reversal of 6505869371808 is 8081739685056.

It is a tau number, because it is divible by the number of its divisors (24).

It is not an unprimeable number, because it can be changed into a prime (6505869371809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33884736216 + ... + 33884736407.

It is an arithmetic number, because the mean of its divisors is an integer number (711579462552).

Almost surely, 2^{6505869371808} is an apocalyptic number.

It is an amenable number.

6505869371808 is an abundant number, since it is smaller than the sum of its proper divisors (10572037729440).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6505869371808 is a wasteful number, since it uses less digits than its factorization.

6505869371808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67769472636 (or 67769472628 counting only the distinct ones).

The product of its (nonzero) digits is 87091200, while the sum is 66.

The spelling of 6505869371808 in words is "six trillion, five hundred five billion, eight hundred sixty-nine million, three hundred seventy-one thousand, eight hundred eight".