11781005273 has 2 divisors, whose sum is σ = 11781005274. Its totient is φ = 11781005272.

The previous prime is 11781005263. The next prime is 11781005279. The reversal of 11781005273 is 37250018711.

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., 8102340169 + 3678665104 = 90013^2 + 60652^2 .

It is an emirp because it is prime and its reverse (37250018711) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11781005273 - 2¹⁴ = 11780988889 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (11781005279) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5890502636 + 5890502637.

It is an arithmetic number, because the mean of its divisors is an integer number (5890502637).

Almost surely, 2^11781005273 is an apocalyptic number.

It is an amenable number.

11781005273 is a deficient number, since it is larger than the sum of its proper divisors (1).

11781005273 is an equidigital number, since it uses as much as digits as its factorization.

11781005273 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11760, while the sum is 35.

The spelling of 11781005273 in words is "eleven billion, seven hundred eighty-one million, five thousand, two hundred seventy-three".