3644011668 has 96 divisors (see below), whose sum is σ = 9437202432. Its totient is φ = 1085123200.

The previous prime is 3644011633. The next prime is 3644011687. The reversal of 3644011668 is 8661104463.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4713730 + ... + 4714502.

It is an arithmetic number, because the mean of its divisors is an integer number (98304192).

Almost surely, 2^3644011668 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 3644011668, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4718601216).

3644011668 is an abundant number, since it is smaller than the sum of its proper divisors (5793190764).

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

3644011668 is a wasteful number, since it uses less digits than its factorization.

3644011668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1365 (or 1363 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 39.

The square root of 3644011668 is about 60365.6497355905. The cubic root of 3644011668 is about 1538.8392428141.

The spelling of 3644011668 in words is "three billion, six hundred forty-four million, eleven thousand, six hundred sixty-eight".