11550506665171 has 4 divisors (see below), whose sum is σ = 11550545046144. Its totient is φ = 11550468284200.

The previous prime is 11550506665153. The next prime is 11550506665273. The reversal of 11550506665171 is 17156660505511.

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 11550506665171 - 2¹³ = 11550506656979 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11550506665111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18735475 + ... + 19342156.

It is an arithmetic number, because the mean of its divisors is an integer number (2887636261536).

Almost surely, 2^{11550506665171} is an apocalyptic number.

11550506665171 is a deficient number, since it is larger than the sum of its proper divisors (38380973).

11550506665171 is an equidigital number, since it uses as much as digits as its factorization.

11550506665171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38380972.

The product of its (nonzero) digits is 945000, while the sum is 49.

The spelling of 11550506665171 in words is "eleven trillion, five hundred fifty billion, five hundred six million, six hundred sixty-five thousand, one hundred seventy-one".