180385140406 has 4 divisors (see below), whose sum is σ = 270577710612. Its totient is φ = 90192570202.

The previous prime is 180385140401. The next prime is 180385140427. The reversal of 180385140406 is 604041583081.

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

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (180385140401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45096285100 + ... + 45096285103.

It is an arithmetic number, because the mean of its divisors is an integer number (67644427653).

Almost surely, 2^180385140406 is an apocalyptic number.

180385140406 is a deficient number, since it is larger than the sum of its proper divisors (90192570206).

180385140406 is an equidigital number, since it uses as much as digits as its factorization.

180385140406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90192570205.

The product of its (nonzero) digits is 92160, while the sum is 40.

The spelling of 180385140406 in words is "one hundred eighty billion, three hundred eighty-five million, one hundred forty thousand, four hundred six".