161328843 has 48 divisors (see below), whose sum is σ = 261424800. Its totient is φ = 95219712.

The previous prime is 161328799. The next prime is 161328883. The reversal of 161328843 is 348823161.

It is not a de Polignac number, because 161328843 - 2⁶ = 161328779 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 161328798 and 161328807.

It is not an unprimeable number, because it can be changed into a prime (161328883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 359083 + ... + 359531.

It is an arithmetic number, because the mean of its divisors is an integer number (5446350).

Almost surely, 2^161328843 is an apocalyptic number.

161328843 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

161328843 is a deficient number, since it is larger than the sum of its proper divisors (100095957).

161328843 is a wasteful number, since it uses less digits than its factorization.

161328843 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 588 (or 585 counting only the distinct ones).

The product of its digits is 27648, while the sum is 36.

The square root of 161328843 is about 12701.5291599083. The cubic root of 161328843 is about 544.3823128491.

The spelling of 161328843 in words is "one hundred sixty-one million, three hundred twenty-eight thousand, eight hundred forty-three".