11664544435665 has 16 divisors (see below), whose sum is σ = 20359932106176. Its totient is φ = 5655536696000.

The previous prime is 11664544435637. The next prime is 11664544435681. The reversal of 11664544435665 is 56653444546611.

It is not a de Polignac number, because 11664544435665 - 2²⁰ = 11664543387089 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11664544435599 and 11664544435608.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35347104186 + ... + 35347104515.

It is an arithmetic number, because the mean of its divisors is an integer number (1272495756636).

Almost surely, 2^{11664544435665} is an apocalyptic number.

11664544435665 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

11664544435665 is a deficient number, since it is larger than the sum of its proper divisors (8695387670511).

11664544435665 is a wasteful number, since it uses less digits than its factorization.

11664544435665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70694208720.

The product of its digits is 124416000, while the sum is 60.

The spelling of 11664544435665 in words is "eleven trillion, six hundred sixty-four billion, five hundred forty-four million, four hundred thirty-five thousand, six hundred sixty-five".