3644618868 has 48 divisors (see below), whose sum is σ = 10308016320. Its totient is φ = 1104429600.

The previous prime is 3644618843. The next prime is 3644618891. The reversal of 3644618868 is 8688164463.

3644618868 is a `hidden beast` number, since 364 + 46 + 188 + 68 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

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 15 ways as a sum of consecutive naturals, for example, 1532743 + ... + 1535118.

It is an arithmetic number, because the mean of its divisors is an integer number (214750340).

Almost surely, 2^3644618868 is an apocalyptic number.

It is an amenable number.

3644618868 is an abundant number, since it is smaller than the sum of its proper divisors (6663397452).

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

3644618868 is a wasteful number, since it uses less digits than its factorization.

3644618868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3067885 (or 3067877 counting only the distinct ones).

The product of its digits is 5308416, while the sum is 54.

The square root of 3644618868 is about 60370.6788764215. The cubic root of 3644618868 is about 1538.9247100939.

The spelling of 3644618868 in words is "three billion, six hundred forty-four million, six hundred eighteen thousand, eight hundred sixty-eight".