161033818 has 12 divisors (see below), whose sum is σ = 265506570. Its totient is φ = 73197080.

The previous prime is 161033791. The next prime is 161033827. The reversal of 161033818 is 818330161.

161033818 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 145612489 + 15421329 = 12067^2 + 3927^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 161033818.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 332473 + ... + 332956.

Almost surely, 2^161033818 is an apocalyptic number.

161033818 is a deficient number, since it is larger than the sum of its proper divisors (104472752).

161033818 is a wasteful number, since it uses less digits than its factorization.

161033818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 665453 (or 665442 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 31.

The square root of 161033818 is about 12689.9100863639. The cubic root of 161033818 is about 544.0502697382.

Adding to 161033818 its reverse (818330161), we get a palindrome (979363979).

The spelling of 161033818 in words is "one hundred sixty-one million, thirty-three thousand, eight hundred eighteen".