180851345 has 4 divisors (see below), whose sum is σ = 217021620. Its totient is φ = 144681072.

The previous prime is 180851327. The next prime is 180851351. The reversal of 180851345 is 543158081.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 543158081 = 29 ⋅18729589.

It can be written as a sum of positive squares in 2 ways, for example, as 104673361 + 76177984 = 10231^2 + 8728^2 .

It is a cyclic number.

It is not a de Polignac number, because 180851345 - 2⁸ = 180851089 is a prime.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 18085130 + ... + 18085139.

It is an arithmetic number, because the mean of its divisors is an integer number (54255405).

Almost surely, 2^180851345 is an apocalyptic number.

It is an amenable number.

180851345 is a deficient number, since it is larger than the sum of its proper divisors (36170275).

180851345 is an equidigital number, since it uses as much as digits as its factorization.

180851345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36170274.

The product of its (nonzero) digits is 19200, while the sum is 35.

The square root of 180851345 is about 13448.0981926814. The cubic root of 180851345 is about 565.5103801812.

The spelling of 180851345 in words is "one hundred eighty million, eight hundred fifty-one thousand, three hundred forty-five".