11545305665 has 32 divisors (see below), whose sum is σ = 14542295040. Its totient is φ = 8788190400.

The previous prime is 11545305643. The next prime is 11545305691. The reversal of 11545305665 is 56650354511.

It is not a de Polignac number, because 11545305665 - 2²⁰ = 11544257089 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10581770 + ... + 10582860.

It is an arithmetic number, because the mean of its divisors is an integer number (454446720).

Almost surely, 2^11545305665 is an apocalyptic number.

It is an amenable number.

11545305665 is a deficient number, since it is larger than the sum of its proper divisors (2996989375).

11545305665 is a wasteful number, since it uses less digits than its factorization.

11545305665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2213.

The product of its (nonzero) digits is 270000, while the sum is 41.

The spelling of 11545305665 in words is "eleven billion, five hundred forty-five million, three hundred five thousand, six hundred sixty-five".