180665818923 has 16 divisors (see below), whose sum is σ = 241682925600. Its totient is φ = 120046407936.

The previous prime is 180665818919. The next prime is 180665818937. The reversal of 180665818923 is 329818566081.

It is not a de Polignac number, because 180665818923 - 2² = 180665818919 is a prime.

It is not an unprimeable number, because it can be changed into a prime (180665818913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11762853 + ... + 11778201.

It is an arithmetic number, because the mean of its divisors is an integer number (15105182850).

Almost surely, 2^180665818923 is an apocalyptic number.

180665818923 is a deficient number, since it is larger than the sum of its proper divisors (61017106677).

180665818923 is a wasteful number, since it uses less digits than its factorization.

180665818923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28046.

The product of its (nonzero) digits is 4976640, while the sum is 57.

The spelling of 180665818923 in words is "one hundred eighty billion, six hundred sixty-five million, eight hundred eighteen thousand, nine hundred twenty-three".