11181640541 has 2 divisors, whose sum is σ = 11181640542. Its totient is φ = 11181640540.

The previous prime is 11181640531. The next prime is 11181640549. The reversal of 11181640541 is 14504618111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10994361316 + 187279225 = 104854^2 + 13685^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11181640541 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11181640498 and 11181640507.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11181640549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5590820270 + 5590820271.

It is an arithmetic number, because the mean of its divisors is an integer number (5590820271).

Almost surely, 2^11181640541 is an apocalyptic number.

It is an amenable number.

11181640541 is a deficient number, since it is larger than the sum of its proper divisors (1).

11181640541 is an equidigital number, since it uses as much as digits as its factorization.

11181640541 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3840, while the sum is 32.

The spelling of 11181640541 in words is "eleven billion, one hundred eighty-one million, six hundred forty thousand, five hundred forty-one".