11180542481 has 2 divisors, whose sum is σ = 11180542482. Its totient is φ = 11180542480.

The previous prime is 11180542453. The next prime is 11180542487. The reversal of 11180542481 is 18424508111.

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., 5683802881 + 5496739600 = 75391^2 + 74140^2 .

It is an emirp because it is prime and its reverse (18424508111) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11180542481 is a prime.

It is a super-2 number, since 2×11180542481² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (11180542487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5590271240 + 5590271241.

It is an arithmetic number, because the mean of its divisors is an integer number (5590271241).

Almost surely, 2^11180542481 is an apocalyptic number.

It is an amenable number.

11180542481 is a deficient number, since it is larger than the sum of its proper divisors (1).

11180542481 is an equidigital number, since it uses as much as digits as its factorization.

11180542481 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10240, while the sum is 35.

The spelling of 11180542481 in words is "eleven billion, one hundred eighty million, five hundred forty-two thousand, four hundred eighty-one".