19481471161 has 4 divisors (see below), whose sum is σ = 19490701824. Its totient is φ = 19472240500.

The previous prime is 19481471159. The next prime is 19481471171. The reversal of 19481471161 is 16117418491.

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: 16117418491 = 181 ⋅89046511.

It is a cyclic number.

It is not a de Polignac number, because 19481471161 - 2¹ = 19481471159 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19481471101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4612165 + ... + 4616386.

It is an arithmetic number, because the mean of its divisors is an integer number (4872675456).

Almost surely, 2^19481471161 is an apocalyptic number.

It is an amenable number.

19481471161 is a deficient number, since it is larger than the sum of its proper divisors (9230663).

19481471161 is an equidigital number, since it uses as much as digits as its factorization.

19481471161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9230662.

The product of its digits is 48384, while the sum is 43.

The spelling of 19481471161 in words is "nineteen billion, four hundred eighty-one million, four hundred seventy-one thousand, one hundred sixty-one".