12321780045 has 8 divisors (see below), whose sum is σ = 19714848096. Its totient is φ = 6571616016.

The previous prime is 12321779999. The next prime is 12321780083. The reversal of 12321780045 is 54008712321.

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

It is not a de Polignac number, because 12321780045 - 2¹⁰ = 12321779021 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 12321779988 and 12321780015.

It is a congruent number.

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, 410725987 + ... + 410726016.

It is an arithmetic number, because the mean of its divisors is an integer number (2464356012).

Almost surely, 2^12321780045 is an apocalyptic number.

12321780045 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12321780045 is a deficient number, since it is larger than the sum of its proper divisors (7393068051).

12321780045 is an equidigital number, since it uses as much as digits as its factorization.

12321780045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 821452011.

The product of its (nonzero) digits is 13440, while the sum is 33.

The spelling of 12321780045 in words is "twelve billion, three hundred twenty-one million, seven hundred eighty thousand, forty-five".