161943600 has 240 divisors, whose sum is σ = 638903552. Its totient is φ = 34145280.

The previous prime is 161943559. The next prime is 161943611. The reversal of 161943600 is 6349161.

161943600 is nontrivially palindromic in base 9.

161943600 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (240).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 108459 + ... + 109941.

Almost surely, 2^161943600 is an apocalyptic number.

161943600 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 161943600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (319451776).

161943600 is an abundant number, since it is smaller than the sum of its proper divisors (476959952).

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

161943600 is a wasteful number, since it uses less digits than its factorization.

161943600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1524 (or 1513 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 30.

The square root of 161943600 is about 12725.7062672372. The cubic root of 161943600 is about 545.0729077897.

The spelling of 161943600 in words is "one hundred sixty-one million, nine hundred forty-three thousand, six hundred".