11665056165559 has 4 divisors (see below), whose sum is σ = 11665287394920. Its totient is φ = 11664824936200.

The previous prime is 11665056165551. The next prime is 11665056165569. The reversal of 11665056165559 is 95556165056611.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 11665056165559 - 2³ = 11665056165551 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11665056165497 and 11665056165506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11665056165551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 115538992 + ... + 115639909.

It is an arithmetic number, because the mean of its divisors is an integer number (2916321848730).

Almost surely, 2^{11665056165559} is an apocalyptic number.

11665056165559 is a deficient number, since it is larger than the sum of its proper divisors (231229361).

11665056165559 is an equidigital number, since it uses as much as digits as its factorization.

11665056165559 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231229360.

The product of its (nonzero) digits is 36450000, while the sum is 61.

The spelling of 11665056165559 in words is "eleven trillion, six hundred sixty-five billion, fifty-six million, one hundred sixty-five thousand, five hundred fifty-nine".