11777118281 has 2 divisors, whose sum is σ = 11777118282. Its totient is φ = 11777118280.

The previous prime is 11777118277. The next prime is 11777118317. The reversal of 11777118281 is 18281177711.

11777118281 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6652849225 + 5124269056 = 81565^2 + 71584^2 .

It is an emirp because it is prime and its reverse (18281177711) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11777118281 - 2² = 11777118277 is a prime.

It is a super-2 number, since 2×11777118281² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (11777118211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5888559140 + 5888559141.

It is an arithmetic number, because the mean of its divisors is an integer number (5888559141).

Almost surely, 2^11777118281 is an apocalyptic number.

It is an amenable number.

11777118281 is a deficient number, since it is larger than the sum of its proper divisors (1).

11777118281 is an equidigital number, since it uses as much as digits as its factorization.

11777118281 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 43904, while the sum is 44.

The spelling of 11777118281 in words is "eleven billion, seven hundred seventy-seven million, one hundred eighteen thousand, two hundred eighty-one".