161233445 has 8 divisors (see below), whose sum is σ = 197979936. Its totient is φ = 125986896.

The previous prime is 161233439. The next prime is 161233447. The reversal of 161233445 is 544332161.

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 161233445 - 2²⁶ = 94124581 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161233447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 374747 + ... + 375176.

It is an arithmetic number, because the mean of its divisors is an integer number (24747492).

Almost surely, 2^161233445 is an apocalyptic number.

It is an amenable number.

161233445 is a deficient number, since it is larger than the sum of its proper divisors (36746491).

161233445 is an equidigital number, since it uses as much as digits as its factorization.

161233445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 749971.

The product of its digits is 8640, while the sum is 29.

The square root of 161233445 is about 12697.7732299801. The cubic root of 161233445 is about 544.2749891519.

The spelling of 161233445 in words is "one hundred sixty-one million, two hundred thirty-three thousand, four hundred forty-five".