8729645385 has 16 divisors (see below), whose sum is σ = 14044605120. Its totient is φ = 4630086720.

The previous prime is 8729645363. The next prime is 8729645413. The reversal of 8729645385 is 5835469278.

It is not a de Polignac number, because 8729645385 - 2¹³ = 8729637193 is a prime.

It is an unprimeable number.

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, 1604955 + ... + 1610384.

It is an arithmetic number, because the mean of its divisors is an integer number (877787820).

Almost surely, 2^8729645385 is an apocalyptic number.

It is an amenable number.

8729645385 is a deficient number, since it is larger than the sum of its proper divisors (5314959735).

8729645385 is a wasteful number, since it uses less digits than its factorization.

8729645385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3215528.

The product of its digits is 14515200, while the sum is 57.

The square root of 8729645385 is about 93432.5713282044. The cubic root of 8729645385 is about 2059.0435583412.

The spelling of 8729645385 in words is "eight billion, seven hundred twenty-nine million, six hundred forty-five thousand, three hundred eighty-five".