11481777217 has 2 divisors, whose sum is σ = 11481777218. Its totient is φ = 11481777216.

The previous prime is 11481777191. The next prime is 11481777239. The reversal of 11481777217 is 71277718411.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9460285696 + 2021491521 = 97264^2 + 44961^2 .

It is a cyclic number.

It is not a de Polignac number, because 11481777217 - 2¹¹ = 11481775169 is a prime.

It is not a weakly prime, because it can be changed into another prime (11481772217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5740888608 + 5740888609.

It is an arithmetic number, because the mean of its divisors is an integer number (5740888609).

Almost surely, 2^11481777217 is an apocalyptic number.

It is an amenable number.

11481777217 is a deficient number, since it is larger than the sum of its proper divisors (1).

11481777217 is an equidigital number, since it uses as much as digits as its factorization.

11481777217 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 153664, while the sum is 46.

The spelling of 11481777217 in words is "eleven billion, four hundred eighty-one million, seven hundred seventy-seven thousand, two hundred seventeen".