161035811 has 32 divisors (see below), whose sum is σ = 186278400. Its totient is φ = 138378240.

The previous prime is 161035807. The next prime is 161035813. The reversal of 161035811 is 118530161.

It is a cyclic number.

It is not a de Polignac number, because 161035811 - 2² = 161035807 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161035813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1229216 + ... + 1229346.

It is an arithmetic number, because the mean of its divisors is an integer number (5821200).

Almost surely, 2^161035811 is an apocalyptic number.

161035811 is a deficient number, since it is larger than the sum of its proper divisors (25242589).

161035811 is a wasteful number, since it uses less digits than its factorization.

161035811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 299.

The product of its (nonzero) digits is 720, while the sum is 26.

The square root of 161035811 is about 12689.9886130761. The cubic root of 161035811 is about 544.0525141689.

Adding to 161035811 its reverse (118530161), we get a palindrome (279565972).

The spelling of 161035811 in words is "one hundred sixty-one million, thirty-five thousand, eight hundred eleven".