11444544521 has 2 divisors, whose sum is σ = 11444544522. Its totient is φ = 11444544520.

The previous prime is 11444544511. The next prime is 11444544523. The reversal of 11444544521 is 12544544411.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11264850496 + 179694025 = 106136^2 + 13405^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11444544521 is a prime.

It is a super-2 number, since 2×11444544521² (a number of 21 digits) contains 22 as substring.

Together with 11444544523, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (11444544523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5722272260 + 5722272261.

It is an arithmetic number, because the mean of its divisors is an integer number (5722272261).

Almost surely, 2^11444544521 is an apocalyptic number.

It is an amenable number.

11444544521 is a deficient number, since it is larger than the sum of its proper divisors (1).

11444544521 is an equidigital number, since it uses as much as digits as its factorization.

11444544521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 51200, while the sum is 35.

The spelling of 11444544521 in words is "eleven billion, four hundred forty-four million, five hundred forty-four thousand, five hundred twenty-one".