180435840172 has 12 divisors (see below), whose sum is σ = 360871680400. Its totient is φ = 77329645776.

The previous prime is 180435840113. The next prime is 180435840181. The reversal of 180435840172 is 271048534081.

180435840172 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3222068547 + ... + 3222068602.

Almost surely, 2^180435840172 is an apocalyptic number.

It is an amenable number.

180435840172 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

180435840172 is a wasteful number, since it uses less digits than its factorization.

180435840172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6444137160 (or 6444137158 counting only the distinct ones).

The product of its (nonzero) digits is 215040, while the sum is 43.

The spelling of 180435840172 in words is "one hundred eighty billion, four hundred thirty-five million, eight hundred forty thousand, one hundred seventy-two".