11010505561 has 8 divisors (see below), whose sum is σ = 12013218144. Its totient is φ = 10008085920.

The previous prime is 11010505523. The next prime is 11010505589. The reversal of 11010505561 is 16550501011.

11010505561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11010505561 - 2⁹ = 11010505049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11010502561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9421 + ... + 148693.

It is an arithmetic number, because the mean of its divisors is an integer number (1501652268).

Almost surely, 2^11010505561 is an apocalyptic number.

11010505561 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11010505561 is a deficient number, since it is larger than the sum of its proper divisors (1002712583).

11010505561 is a wasteful number, since it uses less digits than its factorization.

11010505561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146471.

The product of its (nonzero) digits is 750, while the sum is 25.

The spelling of 11010505561 in words is "eleven billion, ten million, five hundred five thousand, five hundred sixty-one".