180729145 has 8 divisors (see below), whose sum is σ = 217091520. Its totient is φ = 144438960.

The previous prime is 180729119. The next prime is 180729161. The reversal of 180729145 is 541927081.

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

It is not a de Polignac number, because 180729145 - 2⁵ = 180729113 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12375 + ... + 22684.

It is an arithmetic number, because the mean of its divisors is an integer number (27136440).

Almost surely, 2^180729145 is an apocalyptic number.

It is an amenable number.

180729145 is a deficient number, since it is larger than the sum of its proper divisors (36362375).

180729145 is a wasteful number, since it uses less digits than its factorization.

180729145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36095.

The product of its (nonzero) digits is 20160, while the sum is 37.

The square root of 180729145 is about 13443.5540315796. The cubic root of 180729145 is about 565.3829810015.

The spelling of 180729145 in words is "one hundred eighty million, seven hundred twenty-nine thousand, one hundred forty-five".