161141506411 has 4 divisors (see below), whose sum is σ = 161160052032. Its totient is φ = 161122960792.

The previous prime is 161141506403. The next prime is 161141506433. The reversal of 161141506411 is 114605141161.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 114605141161 = 7 ⋅16372163023.

It is a cyclic number.

It is not a de Polignac number, because 161141506411 - 2³ = 161141506403 is a prime.

It is a super-3 number, since 3×161141506411³ (a number of 35 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161141504411) 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, 9259771 + ... + 9277156.

It is an arithmetic number, because the mean of its divisors is an integer number (40290013008).

Almost surely, 2^161141506411 is an apocalyptic number.

161141506411 is a deficient number, since it is larger than the sum of its proper divisors (18545621).

161141506411 is an equidigital number, since it uses as much as digits as its factorization.

161141506411 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18545620.

The product of its (nonzero) digits is 2880, while the sum is 31.

Adding to 161141506411 its reverse (114605141161), we get a palindrome (275746647572).

The spelling of 161141506411 in words is "one hundred sixty-one billion, one hundred forty-one million, five hundred six thousand, four hundred eleven".