180405485 has 8 divisors (see below), whose sum is σ = 233139480. Its totient is φ = 133222464.

The previous prime is 180405469. The next prime is 180405503. The reversal of 180405485 is 584504081.

It can be written as a sum of positive squares in 4 ways, for example, as 34140649 + 146264836 = 5843^2 + 12094^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 180405485 - 2⁴ = 180405469 is a prime.

It is a super-2 number, since 2×180405485² = 65092278036170450, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 1387670 + ... + 1387799.

It is an arithmetic number, because the mean of its divisors is an integer number (29142435).

Almost surely, 2^180405485 is an apocalyptic number.

It is an amenable number.

180405485 is a deficient number, since it is larger than the sum of its proper divisors (52733995).

180405485 is a wasteful number, since it uses less digits than its factorization.

180405485 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2775487.

The product of its (nonzero) digits is 25600, while the sum is 35.

The square root of 180405485 is about 13431.5108978849. The cubic root of 180405485 is about 565.0452726925.

The spelling of 180405485 in words is "one hundred eighty million, four hundred five thousand, four hundred eighty-five".