3643611640 has 16 divisors (see below), whose sum is σ = 8198126280. Its totient is φ = 1457444640.

The previous prime is 3643611613. The next prime is 3643611661. The reversal of 3643611640 is 461163463.

It is a junction number, because it is equal to n+sod(n) for n = 3643611596 and 3643611605.

It is a congruent number.

It is an unprimeable number.

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, 45545106 + ... + 45545185.

Almost surely, 2^3643611640 is an apocalyptic number.

It is an amenable number.

3643611640 is an abundant number, since it is smaller than the sum of its proper divisors (4554514640).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3643611640 is a wasteful number, since it uses less digits than its factorization.

3643611640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91090302 (or 91090298 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 34.

The square root of 3643611640 is about 60362.3362702273. The cubic root of 3643611640 is about 1538.7829311291.

The spelling of 3643611640 in words is "three billion, six hundred forty-three million, six hundred eleven thousand, six hundred forty".