161110419005 has 4 divisors (see below), whose sum is σ = 193332502812. Its totient is φ = 128888335200.

The previous prime is 161110418971. The next prime is 161110419011. The reversal of 161110419005 is 500914011161.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 500914011161 = 61 ⋅8211705101.

It can be written as a sum of positive squares in 2 ways, for example, as 77055652921 + 84054766084 = 277589^2 + 289922^2 .

It is not a de Polignac number, because 161110419005 - 2¹⁰ = 161110417981 is a prime.

It is a super-2 number, since 2×161110419005² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16111041896 + ... + 16111041905.

It is an arithmetic number, because the mean of its divisors is an integer number (48333125703).

Almost surely, 2^161110419005 is an apocalyptic number.

It is an amenable number.

161110419005 is a deficient number, since it is larger than the sum of its proper divisors (32222083807).

161110419005 is an equidigital number, since it uses as much as digits as its factorization.

161110419005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32222083806.

The product of its (nonzero) digits is 1080, while the sum is 29.

The spelling of 161110419005 in words is "one hundred sixty-one billion, one hundred ten million, four hundred nineteen thousand, five".