11171617161 has 4 divisors (see below), whose sum is σ = 14895489552. Its totient is φ = 7447744772.

The previous prime is 11171617153. The next prime is 11171617181. The reversal of 11171617161 is 16171617111.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 11171617161 - 2³ = 11171617153 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11171617111) 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, 1861936191 + ... + 1861936196.

It is an arithmetic number, because the mean of its divisors is an integer number (3723872388).

Almost surely, 2^11171617161 is an apocalyptic number.

It is an amenable number.

11171617161 is a deficient number, since it is larger than the sum of its proper divisors (3723872391).

11171617161 is an equidigital number, since it uses as much as digits as its factorization.

11171617161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3723872390.

The product of its digits is 1764, while the sum is 33.

The spelling of 11171617161 in words is "eleven billion, one hundred seventy-one million, six hundred seventeen thousand, one hundred sixty-one".