180148805 has 4 divisors (see below), whose sum is σ = 216178572. Its totient is φ = 144119040.

The previous prime is 180148753. The next prime is 180148807. The reversal of 180148805 is 508841081.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 130896481 + 49252324 = 11441^2 + 7018^2 .

It is not a de Polignac number, because 180148805 - 2²² = 175954501 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (180148807) 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, 18014876 + ... + 18014885.

It is an arithmetic number, because the mean of its divisors is an integer number (54044643).

Almost surely, 2^180148805 is an apocalyptic number.

It is an amenable number.

180148805 is a deficient number, since it is larger than the sum of its proper divisors (36029767).

180148805 is an equidigital number, since it uses as much as digits as its factorization.

180148805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36029766.

The product of its (nonzero) digits is 10240, while the sum is 35.

The square root of 180148805 is about 13421.9523542590. The cubic root of 180148805 is about 564.7771643246. Note that the first 3 decimals are identical.

Adding to 180148805 its reverse (508841081), we get a palindrome (688989886).

The spelling of 180148805 in words is "one hundred eighty million, one hundred forty-eight thousand, eight hundred five".