864126865 has 16 divisors (see below), whose sum is σ = 1213994880. Its totient is φ = 578090880.

The previous prime is 864126863. The next prime is 864126877. The reversal of 864126865 is 568621468.

It is not a de Polignac number, because 864126865 - 2¹ = 864126863 is a prime.

It is not an unprimeable number, because it can be changed into a prime (864126863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 299655 + ... + 302524.

It is an arithmetic number, because the mean of its divisors is an integer number (75874680).

Almost surely, 2^864126865 is an apocalyptic number.

It is an amenable number.

864126865 is a deficient number, since it is larger than the sum of its proper divisors (349868015).

864126865 is a wasteful number, since it uses less digits than its factorization.

864126865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 602232.

The product of its digits is 552960, while the sum is 46.

The square root of 864126865 is about 29396.0348516598. The cubic root of 864126865 is about 952.4872459445.

The spelling of 864126865 in words is "eight hundred sixty-four million, one hundred twenty-six thousand, eight hundred sixty-five".