11444944991 has 2 divisors, whose sum is σ = 11444944992. Its totient is φ = 11444944990.

The previous prime is 11444944883. The next prime is 11444944993. The reversal of 11444944991 is 19944944411.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11444944991 is a prime.

It is a super-3 number, since 3×11444944991³ (a number of 31 digits) contains 333 as substring.

Together with 11444944993, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11444944993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5722472495 + 5722472496.

It is an arithmetic number, because the mean of its divisors is an integer number (5722472496).

Almost surely, 2^11444944991 is an apocalyptic number.

11444944991 is a deficient number, since it is larger than the sum of its proper divisors (1).

11444944991 is an equidigital number, since it uses as much as digits as its factorization.

11444944991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 746496, while the sum is 50.

The spelling of 11444944991 in words is "eleven billion, four hundred forty-four million, nine hundred forty-four thousand, nine hundred ninety-one".