11516564465 has 16 divisors (see below), whose sum is σ = 15851177472. Its totient is φ = 7868556864.

The previous prime is 11516564453. The next prime is 11516564467. The reversal of 11516564465 is 56446561511.

It is not a de Polignac number, because 11516564465 - 2¹² = 11516560369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11516564467) 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 15 ways as a sum of consecutive naturals, for example, 584249 + ... + 603638.

It is an arithmetic number, because the mean of its divisors is an integer number (990698592).

Almost surely, 2^11516564465 is an apocalyptic number.

It is an amenable number.

11516564465 is a deficient number, since it is larger than the sum of its proper divisors (4334613007).

11516564465 is a wasteful number, since it uses less digits than its factorization.

11516564465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1188176.

The product of its digits is 432000, while the sum is 44.

The spelling of 11516564465 in words is "eleven billion, five hundred sixteen million, five hundred sixty-four thousand, four hundred sixty-five".