161823485 has 8 divisors (see below), whose sum is σ = 194266680. Its totient is φ = 129406464.

The previous prime is 161823463. The next prime is 161823499. The reversal of 161823485 is 584328161.

It can be written as a sum of positive squares in 4 ways, for example, as 36517849 + 125305636 = 6043^2 + 11194^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 161823485 - 2⁶ = 161823421 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 11681 + ... + 21449.

It is an arithmetic number, because the mean of its divisors is an integer number (24283335).

Almost surely, 2^161823485 is an apocalyptic number.

It is an amenable number.

161823485 is a deficient number, since it is larger than the sum of its proper divisors (32443195).

161823485 is an equidigital number, since it uses as much as digits as its factorization.

161823485 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13087.

The product of its digits is 46080, while the sum is 38.

The square root of 161823485 is about 12720.9860073817. The cubic root of 161823485 is about 544.9381126596.

The spelling of 161823485 in words is "one hundred sixty-one million, eight hundred twenty-three thousand, four hundred eighty-five".