161236018 has 8 divisors (see below), whose sum is σ = 242138160. Its totient is φ = 80523300.

The previous prime is 161236013. The next prime is 161236021. The reversal of 161236018 is 810632161.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (161236013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45208 + ... + 48643.

It is an arithmetic number, because the mean of its divisors is an integer number (30267270).

Almost surely, 2^161236018 is an apocalyptic number.

161236018 is a deficient number, since it is larger than the sum of its proper divisors (80902142).

161236018 is an equidigital number, since it uses as much as digits as its factorization.

161236018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94712.

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

The square root of 161236018 is about 12697.8745465531. The cubic root of 161236018 is about 544.2778843578.

Adding to 161236018 its reverse (810632161), we get a palindrome (971868179).

The spelling of 161236018 in words is "one hundred sixty-one million, two hundred thirty-six thousand, eighteen".