161632276 has 36 divisors (see below), whose sum is σ = 308213724. Its totient is φ = 74131200.

The previous prime is 161632241. The next prime is 161632279. The reversal of 161632276 is 672236161.

It is a happy number.

161632276 is digitally balanced in base 3, 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 6 ways, for example, as 33942276 + 127690000 = 5826^2 + 11300^2 .

It is a super-2 number, since 2×161632276² = 52249985289880352, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161632279) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 121696 + ... + 123016.

Almost surely, 2^161632276 is an apocalyptic number.

It is an amenable number.

161632276 is a deficient number, since it is larger than the sum of its proper divisors (146581448).

161632276 is a wasteful number, since it uses less digits than its factorization.

161632276 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1532 (or 1517 counting only the distinct ones).

The product of its digits is 18144, while the sum is 34.

The square root of 161632276 is about 12713.4682915403. The cubic root of 161632276 is about 544.7233969403.

The spelling of 161632276 in words is "one hundred sixty-one million, six hundred thirty-two thousand, two hundred seventy-six".