11644345321 has 16 divisors (see below), whose sum is σ = 13808384640. Its totient is φ = 9607530240.

The previous prime is 11644345291. The next prime is 11644345357. The reversal of 11644345321 is 12354344611.

It is not a de Polignac number, because 11644345321 - 2⁵ = 11644345289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11644345021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19456 + ... + 153841.

It is an arithmetic number, because the mean of its divisors is an integer number (863024040).

Almost surely, 2^11644345321 is an apocalyptic number.

It is an amenable number.

11644345321 is a deficient number, since it is larger than the sum of its proper divisors (2164039319).

11644345321 is a wasteful number, since it uses less digits than its factorization.

11644345321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173664.

The product of its digits is 34560, while the sum is 34.

Adding to 11644345321 its reverse (12354344611), we get a palindrome (23998689932).

The spelling of 11644345321 in words is "eleven billion, six hundred forty-four million, three hundred forty-five thousand, three hundred twenty-one".