11256997841 has 2 divisors, whose sum is σ = 11256997842. Its totient is φ = 11256997840.

The previous prime is 11256997819. The next prime is 11256997859. The reversal of 11256997841 is 14879965211.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11252754241 + 4243600 = 106079^2 + 2060^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11256997841 is a prime.

It is a super-2 number, since 2×11256997841² (a number of 21 digits) contains 22 as substring.

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 (11256997861) 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, 5628498920 + 5628498921.

It is an arithmetic number, because the mean of its divisors is an integer number (5628498921).

Almost surely, 2^11256997841 is an apocalyptic number.

It is an amenable number.

11256997841 is a deficient number, since it is larger than the sum of its proper divisors (1).

11256997841 is an equidigital number, since it uses as much as digits as its factorization.

11256997841 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1088640, while the sum is 53.

The spelling of 11256997841 in words is "eleven billion, two hundred fifty-six million, nine hundred ninety-seven thousand, eight hundred forty-one".