3686858508865 has 96 divisors (see below), whose sum is σ = 5400561551616. Its totient is φ = 2406486620160.

The previous prime is 3686858508847. The next prime is 3686858508869. The reversal of 3686858508865 is 5688058586863.

It is not a de Polignac number, because 3686858508865 - 2¹³ = 3686858500673 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3686858508791 and 3686858508800.

It is not an unprimeable number, because it can be changed into a prime (3686858508869) by changing a digit.

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 95 ways as a sum of consecutive naturals, for example, 446184724 + ... + 446192986.

It is an arithmetic number, because the mean of its divisors is an integer number (56255849496).

Almost surely, 2^{3686858508865} is an apocalyptic number.

3686858508865 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

3686858508865 is a deficient number, since it is larger than the sum of its proper divisors (1713703042751).

3686858508865 is a wasteful number, since it uses less digits than its factorization.

3686858508865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9399 (or 9392 counting only the distinct ones).

The product of its (nonzero) digits is 2654208000, while the sum is 76.

The spelling of 3686858508865 in words is "three trillion, six hundred eighty-six billion, eight hundred fifty-eight million, five hundred eight thousand, eight hundred sixty-five".