161432432 has 20 divisors (see below), whose sum is σ = 357457776. Its totient is φ = 69185280.

The previous prime is 161432431. The next prime is 161432477. The reversal of 161432432 is 234234161.

161432432 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161432431) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 720569 + ... + 720792.

Almost surely, 2^161432432 is an apocalyptic number.

It is an amenable number.

161432432 is an abundant number, since it is smaller than the sum of its proper divisors (196025344).

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

161432432 is a wasteful number, since it uses less digits than its factorization.

161432432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1441376 (or 1441370 counting only the distinct ones).

The product of its digits is 3456, while the sum is 26.

The square root of 161432432 is about 12705.6063216204. The cubic root of 161432432 is about 544.4988035995.

Adding to 161432432 its reverse (234234161), we get a palindrome (395666593).

The spelling of 161432432 in words is "one hundred sixty-one million, four hundred thirty-two thousand, four hundred thirty-two".