161893760 has 64 divisors (see below), whose sum is σ = 442329120. Its totient is φ = 55504896.

The previous prime is 161893751. The next prime is 161893783. The reversal of 161893760 is 67398161.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is an unprimeable number.

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, 13589 + ... + 22548.

Almost surely, 2^161893760 is an apocalyptic number.

161893760 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161893760 is an abundant number, since it is smaller than the sum of its proper divisors (280435360).

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

161893760 is an equidigital number, since it uses as much as digits as its factorization.

161893760 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36163 (or 36151 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 41.

The square root of 161893760 is about 12723.7478755279. The cubic root of 161893760 is about 545.0169845729.

The spelling of 161893760 in words is "one hundred sixty-one million, eight hundred ninety-three thousand, seven hundred sixty".