180845849 has 4 divisors (see below), whose sum is σ = 188708736. Its totient is φ = 172982964.

The previous prime is 180845809. The next prime is 180845921. The reversal of 180845849 is 948548081.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-180845849 is a prime.

It is a super-2 number, since 2×180845849² = 65410442201061602, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (180845809) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3931409 + ... + 3931454.

It is an arithmetic number, because the mean of its divisors is an integer number (47177184).

Almost surely, 2^180845849 is an apocalyptic number.

It is an amenable number.

180845849 is a deficient number, since it is larger than the sum of its proper divisors (7862887).

180845849 is an equidigital number, since it uses as much as digits as its factorization.

180845849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7862886.

The product of its (nonzero) digits is 368640, while the sum is 47.

The square root of 180845849 is about 13447.8938499677. The cubic root of 180845849 is about 565.5046515784.

The spelling of 180845849 in words is "one hundred eighty million, eight hundred forty-five thousand, eight hundred forty-nine".