180281668897 has 4 divisors (see below), whose sum is σ = 196670911536. Its totient is φ = 163892426260.

The previous prime is 180281668873. The next prime is 180281668909. The reversal of 180281668897 is 798866182081.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 798866182081 = 11 ⋅72624198371.

It is a cyclic number.

It is not a de Polignac number, because 180281668897 - 2⁷ = 180281668769 is a prime.

It is not an unprimeable number, because it can be changed into a prime (180281668597) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8194621303 + ... + 8194621324.

It is an arithmetic number, because the mean of its divisors is an integer number (49167727884).

Almost surely, 2^180281668897 is an apocalyptic number.

It is an amenable number.

180281668897 is a deficient number, since it is larger than the sum of its proper divisors (16389242639).

180281668897 is a wasteful number, since it uses less digits than its factorization.

180281668897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16389242638.

The product of its (nonzero) digits is 18579456, while the sum is 64.

The spelling of 180281668897 in words is "one hundred eighty billion, two hundred eighty-one million, six hundred sixty-eight thousand, eight hundred ninety-seven".