11520655166465 has 4 divisors (see below), whose sum is σ = 13824786199764. Its totient is φ = 9216524133168.

The previous prime is 11520655166443. The next prime is 11520655166479. The reversal of 11520655166465 is 56466155602511.

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

It can be written as a sum of positive squares in 2 ways, for example, as 5227094528656 + 6293560637809 = 2286284^2 + 2508697^2 .

It is a cyclic number.

It is not a de Polignac number, because 11520655166465 - 2²² = 11520650972161 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1152065516642 + ... + 1152065516651.

It is an arithmetic number, because the mean of its divisors is an integer number (3456196549941).

Almost surely, 2^{11520655166465} is an apocalyptic number.

It is an amenable number.

11520655166465 is a deficient number, since it is larger than the sum of its proper divisors (2304131033299).

11520655166465 is an equidigital number, since it uses as much as digits as its factorization.

11520655166465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2304131033298.

The product of its (nonzero) digits is 6480000, while the sum is 53.

The spelling of 11520655166465 in words is "eleven trillion, five hundred twenty billion, six hundred fifty-five million, one hundred sixty-six thousand, four hundred sixty-five".