11268381961 has 2 divisors, whose sum is σ = 11268381962. Its totient is φ = 11268381960.

The previous prime is 11268381913. The next prime is 11268381977. The reversal of 11268381961 is 16918386211.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11000863225 + 267518736 = 104885^2 + 16356^2 .

It is a cyclic number.

It is not a de Polignac number, because 11268381961 - 2⁷ = 11268381833 is a prime.

It is not a weakly prime, because it can be changed into another prime (11268381161) 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, 5634190980 + 5634190981.

It is an arithmetic number, because the mean of its divisors is an integer number (5634190981).

Almost surely, 2^11268381961 is an apocalyptic number.

It is an amenable number.

11268381961 is a deficient number, since it is larger than the sum of its proper divisors (1).

11268381961 is an equidigital number, since it uses as much as digits as its factorization.

11268381961 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 124416, while the sum is 46.

The spelling of 11268381961 in words is "eleven billion, two hundred sixty-eight million, three hundred eighty-one thousand, nine hundred sixty-one".