864025064865 has 24 divisors (see below), whose sum is σ = 1497821906880. Its totient is φ = 460758456864.

The previous prime is 864025064839. The next prime is 864025064867. The reversal of 864025064865 is 568460520468.

It is not a de Polignac number, because 864025064865 - 2²¹ = 864022967713 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (864025064867) 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 23 ways as a sum of consecutive naturals, for example, 760735 + ... + 1518804.

It is an arithmetic number, because the mean of its divisors is an integer number (62409246120).

Almost surely, 2^864025064865 is an apocalyptic number.

It is an amenable number.

864025064865 is a deficient number, since it is larger than the sum of its proper divisors (633796842015).

864025064865 is a wasteful number, since it uses less digits than its factorization.

864025064865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2287973 (or 2287970 counting only the distinct ones).

The product of its (nonzero) digits is 11059200, while the sum is 54.

The spelling of 864025064865 in words is "eight hundred sixty-four billion, twenty-five million, sixty-four thousand, eight hundred sixty-five".