161443632 has 120 divisors (see below), whose sum is σ = 491593536. Its totient is φ = 45515904.

The previous prime is 161443631. The next prime is 161443651. The reversal of 161443632 is 236344161.

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 161443632.

It is not an unprimeable number, because it can be changed into a prime (161443631) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 194803 + ... + 195629.

Almost surely, 2^161443632 is an apocalyptic number.

161443632 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 161443632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (245796768).

161443632 is an abundant number, since it is smaller than the sum of its proper divisors (330149904).

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

161443632 is a wasteful number, since it uses less digits than its factorization.

161443632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 935 (or 922 counting only the distinct ones).

The product of its digits is 10368, while the sum is 30.

The square root of 161443632 is about 12706.0470642919. The cubic root of 161443632 is about 544.5113955459.

Adding to 161443632 its reverse (236344161), we get a palindrome (397787793).

The spelling of 161443632 in words is "one hundred sixty-one million, four hundred forty-three thousand, six hundred thirty-two".