180646394 has 8 divisors (see below), whose sum is σ = 280313460. Its totient is φ = 87208576.

The previous prime is 180646391. The next prime is 180646399. The reversal of 180646394 is 493646081.

180646394 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 170955625 + 9690769 = 13075^2 + 3113^2 .

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

It is not an unprimeable number, because it can be changed into a prime (180646391) 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, 1557239 + ... + 1557354.

Almost surely, 2^180646394 is an apocalyptic number.

180646394 is a deficient number, since it is larger than the sum of its proper divisors (99667066).

180646394 is a wasteful number, since it uses less digits than its factorization.

180646394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3114624.

The product of its (nonzero) digits is 124416, while the sum is 41.

The square root of 180646394 is about 13440.4759588342. The cubic root of 180646394 is about 565.2966766231.

The spelling of 180646394 in words is "one hundred eighty million, six hundred forty-six thousand, three hundred ninety-four".