180845513 has 6 divisors (see below), whose sum is σ = 181828062. Its totient is φ = 179864960.

The previous prime is 180845471. The next prime is 180845531. The reversal of 180845513 is 315548081.

It can be written as a sum of positive squares in 3 ways, for example, as 2569609 + 178275904 = 1603^2 + 13352^2 .

It is not a de Polignac number, because 180845513 - 2⁸ = 180845257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (180845543) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 204833 + ... + 205713.

It is an arithmetic number, because the mean of its divisors is an integer number (30304677).

Almost surely, 2^180845513 is an apocalyptic number.

It is an amenable number.

180845513 is a deficient number, since it is larger than the sum of its proper divisors (982549).

180845513 is an frugal number, since it uses more digits than its factorization.

180845513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1995 (or 1114 counting only the distinct ones).

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

The square root of 180845513 is about 13447.8813572994. The cubic root of 180845513 is about 565.5043013544.

The spelling of 180845513 in words is "one hundred eighty million, eight hundred forty-five thousand, five hundred thirteen".