161828161 has 8 divisors (see below), whose sum is σ = 184215744. Its totient is φ = 140719920.

The previous prime is 161828143. The next prime is 161828237.

It is a happy number.

161828161 is nontrivially palindromic in base 10.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 161828161 - 2¹⁹ = 161303873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161828101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 319566 + ... + 320071.

It is an arithmetic number, because the mean of its divisors is an integer number (23026968).

Almost surely, 2^161828161 is an apocalyptic number.

161828161 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

161828161 is a deficient number, since it is larger than the sum of its proper divisors (22387583).

161828161 is a wasteful number, since it uses less digits than its factorization.

161828161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 639671.

The product of its digits is 4608, while the sum is 34.

The square root of 161828161 is about 12721.1697968387. The cubic root of 161828161 is about 544.9433613952.

The spelling of 161828161 in words is "one hundred sixty-one million, eight hundred twenty-eight thousand, one hundred sixty-one".