6385440885 has 16 divisors (see below), whose sum is σ = 10218749184. Its totient is φ = 3404887232.

The previous prime is 6385440881. The next prime is 6385440911. The reversal of 6385440885 is 5880445836.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 6385440885 - 2² = 6385440881 is a prime.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6385440881) 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 15 ways as a sum of consecutive naturals, for example, 40084 + ... + 119906.

It is an arithmetic number, because the mean of its divisors is an integer number (638671824).

Almost surely, 2^6385440885 is an apocalyptic number.

It is an amenable number.

6385440885 is a deficient number, since it is larger than the sum of its proper divisors (3833308299).

6385440885 is a wasteful number, since it uses less digits than its factorization.

6385440885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85164.

The product of its (nonzero) digits is 3686400, while the sum is 51.

The square root of 6385440885 is about 79908.9537223458. The cubic root of 6385440885 is about 1855.2266014957.

The spelling of 6385440885 in words is "six billion, three hundred eighty-five million, four hundred forty thousand, eight hundred eighty-five".