180278045 has 8 divisors (see below), whose sum is σ = 216675000. Its totient is φ = 143994880.

The previous prime is 180278027. The next prime is 180278093. The reversal of 180278045 is 540872081.

It can be written as a sum of positive squares in 4 ways, for example, as 95140516 + 85137529 = 9754^2 + 9227^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 180278045 - 2²⁰ = 179229469 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 180277996 and 180278014.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 24920 + ... + 31329.

It is an arithmetic number, because the mean of its divisors is an integer number (27084375).

Almost surely, 2^180278045 is an apocalyptic number.

It is an amenable number.

180278045 is a deficient number, since it is larger than the sum of its proper divisors (36396955).

180278045 is an equidigital number, since it uses as much as digits as its factorization.

180278045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56895.

The product of its (nonzero) digits is 17920, while the sum is 35.

The square root of 180278045 is about 13426.7659918537. The cubic root of 180278045 is about 564.9121903896.

The spelling of 180278045 in words is "one hundred eighty million, two hundred seventy-eight thousand, forty-five".