161632 has 12 divisors (see below), whose sum is σ = 318276. Its totient is φ = 80800.

The previous prime is 161627. The next prime is 161639. The reversal of 161632 is 236161.

161632 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×161632² = 52249806848, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161639) by changing a digit.

161632 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2494 + ... + 2557.

It is an arithmetic number, because the mean of its divisors is an integer number (26523).

2¹⁶¹⁶³² is an apocalyptic number.

It is an amenable number.

161632 is a deficient number, since it is larger than the sum of its proper divisors (156644).

161632 is an equidigital number, since it uses as much as digits as its factorization.

161632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5061 (or 5053 counting only the distinct ones).

The product of its digits is 216, while the sum is 19.

The square root of 161632 is about 402.0348243623. The cubic root of 161632 is about 54.4723086887.

Adding to 161632 its reverse (236161), we get a palindrome (397793).

Subtracting 161632 from its reverse (236161), we obtain a square (74529 = 273²).

The spelling of 161632 in words is "one hundred sixty-one thousand, six hundred thirty-two".