3685608581 has 8 divisors (see below), whose sum is σ = 3899285280. Its totient is φ = 3473901648.

The previous prime is 3685608571. The next prime is 3685608583. The reversal of 3685608581 is 1858065863.

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 3685608581 - 2¹⁰ = 3685607557 is a prime.

It is a super-2 number, since 2×3685608581² = 27167421224681667122, which contains 22 as substring.

It is a Duffinian 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 (3685608583) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 488591 + ... + 496076.

It is an arithmetic number, because the mean of its divisors is an integer number (487410660).

Almost surely, 2^3685608581 is an apocalyptic number.

It is an amenable number.

3685608581 is a deficient number, since it is larger than the sum of its proper divisors (213676699).

3685608581 is a wasteful number, since it uses less digits than its factorization.

3685608581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 984883.

The product of its (nonzero) digits is 1382400, while the sum is 50.

The square root of 3685608581 is about 60709.2133123136. The cubic root of 3685608581 is about 1544.6724596209.

The spelling of 3685608581 in words is "three billion, six hundred eighty-five million, six hundred eight thousand, five hundred eighty-one".