6486389636865 has 16 divisors (see below), whose sum is σ = 10509593337600. Its totient is φ = 3415617833472.

The previous prime is 6486389636833. The next prime is 6486389636891. The reversal of 6486389636865 is 5686369836846.

It is not a de Polignac number, because 6486389636865 - 2⁵ = 6486389636833 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2736872080 + ... + 2736874449.

It is an arithmetic number, because the mean of its divisors is an integer number (656849583600).

Almost surely, 2^{6486389636865} is an apocalyptic number.

It is an amenable number.

6486389636865 is a deficient number, since it is larger than the sum of its proper divisors (4023203700735).

6486389636865 is a wasteful number, since it uses less digits than its factorization.

6486389636865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5473746616.

The product of its digits is 6449725440, while the sum is 78.

The spelling of 6486389636865 in words is "six trillion, four hundred eighty-six billion, three hundred eighty-nine million, six hundred thirty-six thousand, eight hundred sixty-five".