3681195649 has 8 divisors (see below), whose sum is σ = 3813586920. Its totient is φ = 3549168000.

The previous prime is 3681195611. The next prime is 3681195653. The reversal of 3681195649 is 9465911863.

3681195649 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 4 ways, for example, as 255200625 + 3425995024 = 15975^2 + 58532^2 .

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 3681195649 - 2²⁷ = 3546977921 is a prime.

It is a super-3 number, since 3×3681195649³ (a number of 30 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3681195596 and 3681195605.

It is not an unprimeable number, because it can be changed into a prime (3681195449) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70212 + ... + 110869.

It is an arithmetic number, because the mean of its divisors is an integer number (476698365).

Almost surely, 2^3681195649 is an apocalyptic number.

It is an amenable number.

3681195649 is a deficient number, since it is larger than the sum of its proper divisors (132391271).

3681195649 is a wasteful number, since it uses less digits than its factorization.

3681195649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181811.

The product of its digits is 1399680, while the sum is 52.

The square root of 3681195649 is about 60672.8575971167. The cubic root of 3681195649 is about 1544.0557132717.

The spelling of 3681195649 in words is "three billion, six hundred eighty-one million, one hundred ninety-five thousand, six hundred forty-nine".