161105630 has 24 divisors (see below), whose sum is σ = 337336488. Its totient is φ = 55236048.

The previous prime is 161105629. The next prime is 161105641. The reversal of 161105630 is 36501161.

It is a happy number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 161105596 and 161105605.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 163904 + ... + 164883.

It is an arithmetic number, because the mean of its divisors is an integer number (14055687).

Almost surely, 2^161105630 is an apocalyptic number.

161105630 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

161105630 is an abundant number, since it is smaller than the sum of its proper divisors (176230858).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161105630 is a wasteful number, since it uses less digits than its factorization.

161105630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 328808 (or 328801 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 23.

The square root of 161105630 is about 12692.7392630590. The cubic root of 161105630 is about 544.1311296311.

Adding to 161105630 its reverse (36501161), we get a palindrome (197606791).

The spelling of 161105630 in words is "one hundred sixty-one million, one hundred five thousand, six hundred thirty".