11817419161 has 4 divisors (see below), whose sum is σ = 11851475472. Its totient is φ = 11783362852.

The previous prime is 11817419147. The next prime is 11817419167. The reversal of 11817419161 is 16191471811.

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, and also an emirpimes, since its reverse is a distinct semiprime: 16191471811 = 491 ⋅32976521.

It is a cyclic number.

It is not a de Polignac number, because 11817419161 - 2⁵ = 11817419129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11817419167) 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, 17027635 + ... + 17028328.

It is an arithmetic number, because the mean of its divisors is an integer number (2962868868).

Almost surely, 2^11817419161 is an apocalyptic number.

It is an amenable number.

11817419161 is a deficient number, since it is larger than the sum of its proper divisors (34056311).

11817419161 is an equidigital number, since it uses as much as digits as its factorization.

11817419161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34056310.

The product of its digits is 12096, while the sum is 40.

The spelling of 11817419161 in words is "eleven billion, eight hundred seventeen million, four hundred nineteen thousand, one hundred sixty-one".