11013535561 has 32 divisors (see below), whose sum is σ = 13434640128. Its totient is φ = 8813629440.

The previous prime is 11013535553. The next prime is 11013535567. The reversal of 11013535561 is 16553531011.

It is a happy number.

It is not a de Polignac number, because 11013535561 - 2³ = 11013535553 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11013535567) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10871691 + ... + 10872703.

It is an arithmetic number, because the mean of its divisors is an integer number (419832504).

Almost surely, 2^11013535561 is an apocalyptic number.

It is an amenable number.

11013535561 is a deficient number, since it is larger than the sum of its proper divisors (2421104567).

11013535561 is a wasteful number, since it uses less digits than its factorization.

11013535561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1681.

The product of its (nonzero) digits is 6750, while the sum is 31.

The spelling of 11013535561 in words is "eleven billion, thirteen million, five hundred thirty-five thousand, five hundred sixty-one".