11056501009 has 2 divisors, whose sum is σ = 11056501010. Its totient is φ = 11056501008.

The previous prime is 11056501003. The next prime is 11056501063. The reversal of 11056501009 is 90010565011.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9944078400 + 1112422609 = 99720^2 + 33353^2 .

It is an emirp because it is prime and its reverse (90010565011) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11056501009 is a prime.

It is not a weakly prime, because it can be changed into another prime (11056501003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5528250504 + 5528250505.

It is an arithmetic number, because the mean of its divisors is an integer number (5528250505).

Almost surely, 2^11056501009 is an apocalyptic number.

It is an amenable number.

11056501009 is a deficient number, since it is larger than the sum of its proper divisors (1).

11056501009 is an equidigital number, since it uses as much as digits as its factorization.

11056501009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1350, while the sum is 28.

The spelling of 11056501009 in words is "eleven billion, fifty-six million, five hundred one thousand, nine".