11056550161 has 2 divisors, whose sum is σ = 11056550162. Its totient is φ = 11056550160.

The previous prime is 11056550159. The next prime is 11056550171. The reversal of 11056550161 is 16105565011.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10894140625 + 162409536 = 104375^2 + 12744^2 .

It is a cyclic number.

It is not a de Polignac number, because 11056550161 - 2¹ = 11056550159 is a prime.

Together with 11056550159, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (11056550111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5528275080 + 5528275081.

It is an arithmetic number, because the mean of its divisors is an integer number (5528275081).

Almost surely, 2^11056550161 is an apocalyptic number.

It is an amenable number.

11056550161 is a deficient number, since it is larger than the sum of its proper divisors (1).

11056550161 is an equidigital number, since it uses as much as digits as its factorization.

11056550161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4500, while the sum is 31.

The spelling of 11056550161 in words is "eleven billion, fifty-six million, five hundred fifty thousand, one hundred sixty-one".