64185385 has 32 divisors (see below), whose sum is σ = 86873472. Its totient is φ = 45127680.

The previous prime is 64185383. The next prime is 64185403. The reversal of 64185385 is 58358146.

64185385 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 64185385 - 2¹ = 64185383 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64185383) 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 31 ways as a sum of consecutive naturals, for example, 282642 + ... + 282868.

It is an arithmetic number, because the mean of its divisors is an integer number (2714796).

Almost surely, 2^64185385 is an apocalyptic number.

It is an amenable number.

64185385 is a deficient number, since it is larger than the sum of its proper divisors (22688087).

64185385 is a wasteful number, since it uses less digits than its factorization.

64185385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 393.

The product of its digits is 115200, while the sum is 40.

The square root of 64185385 is about 8011.5781841033. The cubic root of 64185385 is about 400.3858464366.

The spelling of 64185385 in words is "sixty-four million, one hundred eighty-five thousand, three hundred eighty-five".