3670871581 has 4 divisors (see below), whose sum is σ = 3953246332. Its totient is φ = 3388496832.

The previous prime is 3670871539. The next prime is 3670871587. The reversal of 3670871581 is 1851780763.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1542525625 + 2128345956 = 39275^2 + 46134^2 .

It is a cyclic number.

It is not a de Polignac number, because 3670871581 - 2⁷ = 3670871453 is a prime.

It is a super-2 number, since 2×3670871581² = 26950596328386879122, 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 (3670871587) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 141187356 + ... + 141187381.

It is an arithmetic number, because the mean of its divisors is an integer number (988311583).

Almost surely, 2^3670871581 is an apocalyptic number.

It is an amenable number.

3670871581 is a deficient number, since it is larger than the sum of its proper divisors (282374751).

3670871581 is a wasteful number, since it uses less digits than its factorization.

3670871581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 282374750.

The product of its (nonzero) digits is 282240, while the sum is 46.

The square root of 3670871581 is about 60587.7180705793. The cubic root of 3670871581 is about 1542.6109053609.

The spelling of 3670871581 in words is "three billion, six hundred seventy million, eight hundred seventy-one thousand, five hundred eighty-one".