161141811 has 4 divisors (see below), whose sum is σ = 214855752. Its totient is φ = 107427872.

The previous prime is 161141801. The next prime is 161141819. The reversal of 161141811 is 118141161.

161141811 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 161141811 - 2¹⁰ = 161140787 is a prime.

It is not an unprimeable number, because it can be changed into a prime (161141819) 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, 26856966 + ... + 26856971.

It is an arithmetic number, because the mean of its divisors is an integer number (53713938).

Almost surely, 2^161141811 is an apocalyptic number.

161141811 is a deficient number, since it is larger than the sum of its proper divisors (53713941).

161141811 is an equidigital number, since it uses as much as digits as its factorization.

161141811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53713940.

The product of its digits is 192, while the sum is 24.

The square root of 161141811 is about 12694.1644467054. The cubic root of 161141811 is about 544.1718601233.

Adding to 161141811 its reverse (118141161), we get a palindrome (279282972).

The spelling of 161141811 in words is "one hundred sixty-one million, one hundred forty-one thousand, eight hundred eleven".