3681716585 has 8 divisors (see below), whose sum is σ = 4437354120. Its totient is φ = 2932510464.

The previous prime is 3681716567. The next prime is 3681716609. The reversal of 3681716585 is 5856171863.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 997233241 + 2684483344 = 31579^2 + 51812^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3681716585 - 2²⁰ = 3680668009 is a prime.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 1606592 + ... + 1608881.

It is an arithmetic number, because the mean of its divisors is an integer number (554669265).

Almost surely, 2^3681716585 is an apocalyptic number.

It is an amenable number.

3681716585 is a deficient number, since it is larger than the sum of its proper divisors (755637535).

3681716585 is a wasteful number, since it uses less digits than its factorization.

3681716585 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3215707.

The product of its digits is 1209600, while the sum is 50.

The square root of 3681716585 is about 60677.1504357283. The cubic root of 3681716585 is about 1544.1285443430.

The spelling of 3681716585 in words is "three billion, six hundred eighty-one million, seven hundred sixteen thousand, five hundred eighty-five".