161889792 has 40 divisors (see below), whose sum is σ = 431288616. Its totient is φ = 53962752.

The previous prime is 161889779. The next prime is 161889811. The reversal of 161889792 is 297988161.

161889792 is digitally balanced in base 3, 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 pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51163 + ... + 54234.

Almost surely, 2^161889792 is an apocalyptic number.

161889792 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

161889792 is an abundant number, since it is smaller than the sum of its proper divisors (269398824).

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

161889792 is an equidigital number, since it uses as much as digits as its factorization.

161889792 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105418 (or 105402 counting only the distinct ones).

The product of its digits is 435456, while the sum is 51.

The square root of 161889792 is about 12723.5919456732. The cubic root of 161889792 is about 545.0125317658.

The spelling of 161889792 in words is "one hundred sixty-one million, eight hundred eighty-nine thousand, seven hundred ninety-two".