161334811 has 16 divisors (see below), whose sum is σ = 194462208. Its totient is φ = 132035200.

The previous prime is 161334781. The next prime is 161334847. The reversal of 161334811 is 118433161.

It is not a de Polignac number, because 161334811 - 2⁵ = 161334779 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 161334811.

It is not an unprimeable number, because it can be changed into a prime (161334011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14455 + ... + 23056.

It is an arithmetic number, because the mean of its divisors is an integer number (12153888).

Almost surely, 2^161334811 is an apocalyptic number.

161334811 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

161334811 is a deficient number, since it is larger than the sum of its proper divisors (33127397).

161334811 is a wasteful number, since it uses less digits than its factorization.

161334811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37562.

The product of its digits is 1728, while the sum is 28.

The square root of 161334811 is about 12701.7640900782. The cubic root of 161334811 is about 544.3890255020.

Adding to 161334811 its reverse (118433161), we get a palindrome (279767972).

The spelling of 161334811 in words is "one hundred sixty-one million, three hundred thirty-four thousand, eight hundred eleven".