3644402321 has 8 divisors (see below), whose sum is σ = 4165617984. Its totient is φ = 3123333360.

The previous prime is 3644402297. The next prime is 3644402327. The reversal of 3644402321 is 1232044463.

3644402321 is digitally balanced in base 3, 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 not a de Polignac number, because 3644402321 - 2²² = 3640208017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3644402327) 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, 23051 + ... + 88431.

It is an arithmetic number, because the mean of its divisors is an integer number (520702248).

Almost surely, 2^3644402321 is an apocalyptic number.

It is an amenable number.

3644402321 is a deficient number, since it is larger than the sum of its proper divisors (521215663).

3644402321 is an equidigital number, since it uses as much as digits as its factorization.

3644402321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73351.

The product of its (nonzero) digits is 13824, while the sum is 29.

The square root of 3644402321 is about 60368.8853715223. The cubic root of 3644402321 is about 1538.8942308090.

Adding to 3644402321 its reverse (1232044463), we get a palindrome (4876446784).

The spelling of 3644402321 in words is "three billion, six hundred forty-four million, four hundred two thousand, three hundred twenty-one".