11644132231 has 4 divisors (see below), whose sum is σ = 11694980200. Its totient is φ = 11593284264.

The previous prime is 11644132217. The next prime is 11644132259. The reversal of 11644132231 is 13223144611.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 11644132231 - 2¹⁵ = 11644099463 is a prime.

It is a super-2 number, since 2×11644132231² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11644132231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11644132931) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25423641 + ... + 25424098.

It is an arithmetic number, because the mean of its divisors is an integer number (2923745050).

Almost surely, 2^11644132231 is an apocalyptic number.

11644132231 is a deficient number, since it is larger than the sum of its proper divisors (50847969).

11644132231 is an equidigital number, since it uses as much as digits as its factorization.

11644132231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50847968.

The product of its digits is 3456, while the sum is 28.

Adding to 11644132231 its reverse (13223144611), we get a palindrome (24867276842).

The spelling of 11644132231 in words is "eleven billion, six hundred forty-four million, one hundred thirty-two thousand, two hundred thirty-one".