161355600 has 360 divisors, whose sum is σ = 675621440. Its totient is φ = 34836480.

The previous prime is 161355533. The next prime is 161355617. The reversal of 161355600 is 6553161.

It is a happy number.

161355600 is a `hidden beast` number, since 1 + 6 + 1 + 3 + 55 + 600 = 666.

It is a tau number, because it is divible by the number of its divisors (360).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 478632 + ... + 478968.

Almost surely, 2^161355600 is an apocalyptic number.

161355600 is a gapful number since it is divisible by the number (10) 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 161355600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (337810720).

161355600 is an abundant number, since it is smaller than the sum of its proper divisors (514265840).

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

161355600 is a wasteful number, since it uses less digits than its factorization.

161355600 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 387 (or 373 counting only the distinct ones).

The product of its (nonzero) digits is 2700, while the sum is 27.

The square root of 161355600 is about 12702.5824146116. The cubic root of 161355600 is about 544.4124071419.

The spelling of 161355600 in words is "one hundred sixty-one million, three hundred fifty-five thousand, six hundred".