161765031224 has 32 divisors (see below), whose sum is σ = 321628540320. Its totient is φ = 76011565056.

The previous prime is 161765031223. The next prime is 161765031229. The reversal of 161765031224 is 422130567161.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161765031223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 792164 + ... + 975219.

It is an arithmetic number, because the mean of its divisors is an integer number (10050891885).

Almost surely, 2^161765031224 is an apocalyptic number.

It is an amenable number.

161765031224 is a deficient number, since it is larger than the sum of its proper divisors (159863509096).

161765031224 is a wasteful number, since it uses less digits than its factorization.

161765031224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1768079 (or 1768075 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 38.

Adding to 161765031224 its reverse (422130567161), we get a palindrome (583895598385).

The spelling of 161765031224 in words is "one hundred sixty-one billion, seven hundred sixty-five million, thirty-one thousand, two hundred twenty-four".