11644420423 has 4 divisors (see below), whose sum is σ = 11650619440. Its totient is φ = 11638221408.

The previous prime is 11644420379. The next prime is 11644420429. The reversal of 11644420423 is 32402444611.

11644420423 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32402444611 = 181 ⋅179019031.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11644420423 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11644420429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3096690 + ... + 3100447.

It is an arithmetic number, because the mean of its divisors is an integer number (2912654860).

Almost surely, 2^11644420423 is an apocalyptic number.

11644420423 is a deficient number, since it is larger than the sum of its proper divisors (6199017).

11644420423 is an equidigital number, since it uses as much as digits as its factorization.

11644420423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6199016.

The product of its (nonzero) digits is 18432, while the sum is 31.

The spelling of 11644420423 in words is "eleven billion, six hundred forty-four million, four hundred twenty thousand, four hundred twenty-three".