161606432 has 24 divisors (see below), whose sum is σ = 342637596. Its totient is φ = 74587392.

The previous prime is 161606413. The next prime is 161606449. The reversal of 161606432 is 234606161.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 152868496 + 8737936 = 12364^2 + 2956^2 .

It is a super-2 number, since 2×161606432² = 52233277727541248, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 161606395 and 161606404.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 193823 + ... + 194654.

Almost surely, 2^161606432 is an apocalyptic number.

It is an amenable number.

161606432 is an abundant number, since it is smaller than the sum of its proper divisors (181031164).

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

161606432 is a wasteful number, since it uses less digits than its factorization.

161606432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 388500 (or 388492 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 161606432 is about 12712.4518484830. The cubic root of 161606432 is about 544.6943627601.

The spelling of 161606432 in words is "one hundred sixty-one million, six hundred six thousand, four hundred thirty-two".