11443538196191 has 4 divisors (see below), whose sum is σ = 11497772974584. Its totient is φ = 11389303417800.

The previous prime is 11443538196187. The next prime is 11443538196221. The reversal of 11443538196191 is 19169183534411.

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 11443538196191 - 2² = 11443538196187 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 (11443538196121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27117388880 + ... + 27117389301.

It is an arithmetic number, because the mean of its divisors is an integer number (2874443243646).

Almost surely, 2^{11443538196191} is an apocalyptic number.

11443538196191 is a deficient number, since it is larger than the sum of its proper divisors (54234778393).

11443538196191 is an equidigital number, since it uses as much as digits as its factorization.

11443538196191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54234778392.

The product of its digits is 2799360, while the sum is 56.

The spelling of 11443538196191 in words is "eleven trillion, four hundred forty-three billion, five hundred thirty-eight million, one hundred ninety-six thousand, one hundred ninety-one".