11544559227181 has 2 divisors, whose sum is σ = 11544559227182. Its totient is φ = 11544559227180.

The previous prime is 11544559227133. The next prime is 11544559227217. The reversal of 11544559227181 is 18172295544511.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7810118926281 + 3734440300900 = 2794659^2 + 1932470^2 .

It is a cyclic number.

It is not a de Polignac number, because 11544559227181 - 2⁷ = 11544559227053 is a prime.

It is a super-4 number, since 4×11544559227181⁴ (a number of 53 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11544559927181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5772279613590 + 5772279613591.

It is an arithmetic number, because the mean of its divisors is an integer number (5772279613591).

Almost surely, 2^{11544559227181} is an apocalyptic number.

It is an amenable number.

11544559227181 is a deficient number, since it is larger than the sum of its proper divisors (1).

11544559227181 is an equidigital number, since it uses as much as digits as its factorization.

11544559227181 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4032000, while the sum is 55.

The spelling of 11544559227181 in words is "eleven trillion, five hundred forty-four billion, five hundred fifty-nine million, two hundred twenty-seven thousand, one hundred eighty-one".