3664638544 has 80 divisors (see below), whose sum is σ = 8252527360. Its totient is φ = 1544002560.

The previous prime is 3664638487. The next prime is 3664638569. The reversal of 3664638544 is 4458364663.

It is a happy number.

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, 3588754 + ... + 3589774.

It is an arithmetic number, because the mean of its divisors is an integer number (103156592).

Almost surely, 2^3664638544 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3664638544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4126263680).

3664638544 is an abundant number, since it is smaller than the sum of its proper divisors (4587888816).

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

3664638544 is a wasteful number, since it uses less digits than its factorization.

3664638544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1548 (or 1542 counting only the distinct ones).

The product of its digits is 4976640, while the sum is 49.

The square root of 3664638544 is about 60536.2580938069. The cubic root of 3664638544 is about 1541.7373073736.

The spelling of 3664638544 in words is "three billion, six hundred sixty-four million, six hundred thirty-eight thousand, five hundred forty-four".