11110064561 has 4 divisors (see below), whose sum is σ = 11298370800. Its totient is φ = 10921758324.

The previous prime is 11110064551. The next prime is 11110064597. The reversal of 11110064561 is 16546001111.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11110064561 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11110064561.

It is not an unprimeable number, because it can be changed into a prime (11110064501) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 94153031 + ... + 94153148.

It is an arithmetic number, because the mean of its divisors is an integer number (2824592700).

Almost surely, 2^11110064561 is an apocalyptic number.

It is an amenable number.

11110064561 is a deficient number, since it is larger than the sum of its proper divisors (188306239).

11110064561 is an equidigital number, since it uses as much as digits as its factorization.

11110064561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188306238.

The product of its (nonzero) digits is 720, while the sum is 26.

Adding to 11110064561 its reverse (16546001111), we get a palindrome (27656065672).

The spelling of 11110064561 in words is "eleven billion, one hundred ten million, sixty-four thousand, five hundred sixty-one".