161916432 has 40 divisors (see below), whose sum is σ = 442891296. Its totient is φ = 50797056.

The previous prime is 161916413. The next prime is 161916437. The reversal of 161916432 is 234619161.

It is a super-2 number, since 2×161916432² = 52433861903221248, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 161916393 and 161916402.

It is not an unprimeable number, because it can be changed into a prime (161916437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 98398 + ... + 100029.

Almost surely, 2^161916432 is an apocalyptic number.

161916432 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

161916432 is an abundant number, since it is smaller than the sum of its proper divisors (280974864).

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

161916432 is a wasteful number, since it uses less digits than its factorization.

161916432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198455 (or 198449 counting only the distinct ones).

The product of its digits is 7776, while the sum is 33.

The square root of 161916432 is about 12724.6387767983. The cubic root of 161916432 is about 545.0424252247.

The spelling of 161916432 in words is "one hundred sixty-one million, nine hundred sixteen thousand, four hundred thirty-two".