161377216 has 168 divisors, whose sum is σ = 435112160. Its totient is φ = 57784320.

The previous prime is 161377163. The next prime is 161377253. The reversal of 161377216 is 612773161.

161377216 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 an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 704590 + ... + 704818.

Almost surely, 2^161377216 is an apocalyptic number.

161377216 is a gapful number since it is divisible by the number (16) 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 161377216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (217556080).

161377216 is an abundant number, since it is smaller than the sum of its proper divisors (273734944).

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

161377216 is a wasteful number, since it uses less digits than its factorization.

161377216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 283 (or 262 counting only the distinct ones).

The product of its digits is 10584, while the sum is 34.

The square root of 161377216 is about 12703.4332367278. The cubic root of 161377216 is about 544.4367167891.

The spelling of 161377216 in words is "one hundred sixty-one million, three hundred seventy-seven thousand, two hundred sixteen".