11644421327 has 12 divisors (see below), whose sum is σ = 14627703888. Its totient is φ = 9073574400.

The previous prime is 11644421309. The next prime is 11644421351. The reversal of 11644421327 is 72312444611.

It is not a de Polignac number, because 11644421327 - 2¹² = 11644417231 is a prime.

It is a super-3 number, since 3×11644421327³ (a number of 31 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11644421827) 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 11 ways as a sum of consecutive naturals, for example, 6873074 + ... + 6874767.

It is an arithmetic number, because the mean of its divisors is an integer number (1218975324).

Almost surely, 2^11644421327 is an apocalyptic number.

11644421327 is a deficient number, since it is larger than the sum of its proper divisors (2983282561).

11644421327 is a wasteful number, since it uses less digits than its factorization.

11644421327 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13747870 (or 13747859 counting only the distinct ones).

The product of its digits is 32256, while the sum is 35.

Adding to 11644421327 its reverse (72312444611), we get a palindrome (83956865938).

The spelling of 11644421327 in words is "eleven billion, six hundred forty-four million, four hundred twenty-one thousand, three hundred twenty-seven".