161302018 has 16 divisors (see below), whose sum is σ = 263111544. Its totient is φ = 73854720.

The previous prime is 161302007. The next prime is 161302051. The reversal of 161302018 is 810203161.

It can be written as a sum of positive squares in 4 ways, for example, as 161213809 + 88209 = 12697^2 + 297^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 161302018.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 62853 + ... + 65368.

Almost surely, 2^161302018 is an apocalyptic number.

161302018 is a deficient number, since it is larger than the sum of its proper divisors (101809526).

161302018 is a wasteful number, since it uses less digits than its factorization.

161302018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128277.

The product of its (nonzero) digits is 288, while the sum is 22.

The square root of 161302018 is about 12700.4731407928. The cubic root of 161302018 is about 544.3521387345.

Adding to 161302018 its reverse (810203161), we get a palindrome (971505179).

The spelling of 161302018 in words is "one hundred sixty-one million, three hundred two thousand, eighteen".