3639811649 has 8 divisors (see below), whose sum is σ = 3813305088. Its totient is φ = 3469823280.

The previous prime is 3639811621. The next prime is 3639811661. The reversal of 3639811649 is 9461189363.

3639811649 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 3639811649 - 2⁸ = 3639811393 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3639811597 and 3639811606.

It is not an unprimeable number, because it can be changed into a prime (3639811349) 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, 874142 + ... + 878295.

It is an arithmetic number, because the mean of its divisors is an integer number (476663136).

Almost surely, 2^3639811649 is an apocalyptic number.

It is an amenable number.

3639811649 is a deficient number, since it is larger than the sum of its proper divisors (173493439).

3639811649 is a wasteful number, since it uses less digits than its factorization.

3639811649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1752535.

The product of its digits is 839808, while the sum is 50.

The square root of 3639811649 is about 60330.8515520873. The cubic root of 3639811649 is about 1538.2478031828.

The spelling of 3639811649 in words is "three billion, six hundred thirty-nine million, eight hundred eleven thousand, six hundred forty-nine".