3616358581 has 6 divisors (see below), whose sum is σ = 3975005846. Its totient is φ = 3287598600.

The previous prime is 3616358561. The next prime is 3616358617. The reversal of 3616358581 is 1858536163.

3616358581 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 3079695025 + 536663556 = 55495^2 + 23166^2 .

It is not a de Polignac number, because 3616358581 - 2⁷ = 3616358453 is a prime.

It is a super-2 number, since 2×3616358581² = 26156098772744667122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3616358561) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 14943510 + ... + 14943751.

Almost surely, 2^3616358581 is an apocalyptic number.

It is an amenable number.

3616358581 is a deficient number, since it is larger than the sum of its proper divisors (358647265).

3616358581 is a wasteful number, since it uses less digits than its factorization.

3616358581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29887283 (or 29887272 counting only the distinct ones).

The product of its digits is 518400, while the sum is 46.

The square root of 3616358581 is about 60136.1669962428. The cubic root of 3616358581 is about 1534.9367897945.

The spelling of 3616358581 in words is "three billion, six hundred sixteen million, three hundred fifty-eight thousand, five hundred eighty-one".