161816035 has 4 divisors (see below), whose sum is σ = 194179248. Its totient is φ = 129452824.

The previous prime is 161816033. The next prime is 161816051. The reversal of 161816035 is 530618161.

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 161816035 - 2¹ = 161816033 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 161815988 and 161816006.

It is not an unprimeable number, because it can be changed into a prime (161816033) 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, 16181599 + ... + 16181608.

It is an arithmetic number, because the mean of its divisors is an integer number (48544812).

Almost surely, 2^161816035 is an apocalyptic number.

161816035 is a deficient number, since it is larger than the sum of its proper divisors (32363213).

161816035 is an equidigital number, since it uses as much as digits as its factorization.

161816035 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32363212.

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 161816035 is about 12720.6931807980. The cubic root of 161816035 is about 544.9297499442.

The spelling of 161816035 in words is "one hundred sixty-one million, eight hundred sixteen thousand, thirty-five".