3601181385 has 12 divisors (see below), whose sum is σ = 6242047812. Its totient is φ = 1920630048.

The previous prime is 3601181347. The next prime is 3601181387. The reversal of 3601181385 is 5831811063.

3601181385 is a `hidden beast` number, since 3 + 601 + 18 + 1 + 38 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 588159504 + 3013021881 = 24252^2 + 54891^2 .

It is not a de Polignac number, because 3601181385 - 2⁷ = 3601181257 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3601181387) 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 11 ways as a sum of consecutive naturals, for example, 40013082 + ... + 40013171.

It is an arithmetic number, because the mean of its divisors is an integer number (520170651).

Almost surely, 2^3601181385 is an apocalyptic number.

It is an amenable number.

3601181385 is a deficient number, since it is larger than the sum of its proper divisors (2640866427).

3601181385 is a wasteful number, since it uses less digits than its factorization.

3601181385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80026264 (or 80026261 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 36.

The square root of 3601181385 is about 60009.8440674528. The cubic root of 3601181385 is about 1532.7864957978.

The spelling of 3601181385 in words is "three billion, six hundred one million, one hundred eighty-one thousand, three hundred eighty-five".