11085505960561 has 4 divisors (see below), whose sum is σ = 11085513160932. Its totient is φ = 11085498760192.

The previous prime is 11085505960541. The next prime is 11085505960579. The reversal of 11085505960561 is 16506950558011.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 10227555783025 + 857950177536 = 3198055^2 + 926256^2 .

It is a cyclic number.

It is not a de Polignac number, because 11085505960561 - 2⁷ = 11085505960433 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11085505960499 and 11085505960508.

It is not an unprimeable number, because it can be changed into a prime (11085505960541) 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 in 3 ways as a sum of consecutive naturals, for example, 254320 + ... + 4715473.

It is an arithmetic number, because the mean of its divisors is an integer number (2771378290233).

Almost surely, 2^{11085505960561} is an apocalyptic number.

It is an amenable number.

11085505960561 is a deficient number, since it is larger than the sum of its proper divisors (7200371).

11085505960561 is an equidigital number, since it uses as much as digits as its factorization.

11085505960561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7200370.

The product of its (nonzero) digits is 1620000, while the sum is 52.

The spelling of 11085505960561 in words is "eleven trillion, eighty-five billion, five hundred five million, nine hundred sixty thousand, five hundred sixty-one".