161118284 has 12 divisors (see below), whose sum is σ = 291052608. Its totient is φ = 77960400.

The previous prime is 161118283. The next prime is 161118301. The reversal of 161118284 is 482811161.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 161118284.

It is not an unprimeable number, because it can be changed into a prime (161118283) 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 3 ways as a sum of consecutive naturals, for example, 649547 + ... + 649794.

It is an arithmetic number, because the mean of its divisors is an integer number (24254384).

Almost surely, 2^161118284 is an apocalyptic number.

It is an amenable number.

161118284 is a deficient number, since it is larger than the sum of its proper divisors (129934324).

161118284 is a wasteful number, since it uses less digits than its factorization.

161118284 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1299376 (or 1299374 counting only the distinct ones).

The product of its digits is 3072, while the sum is 32.

The square root of 161118284 is about 12693.2377272310. The cubic root of 161118284 is about 544.1453754710.

The spelling of 161118284 in words is "one hundred sixty-one million, one hundred eighteen thousand, two hundred eighty-four".