12781660223 has 8 divisors (see below), whose sum is σ = 12829982208. Its totient is φ = 12733416864.

The previous prime is 12781660219. The next prime is 12781660237. The reversal of 12781660223 is 32206618721.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 12781660223 - 2² = 12781660219 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12781660523) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 316865 + ... + 354917.

It is an arithmetic number, because the mean of its divisors is an integer number (1603747776).

Almost surely, 2^12781660223 is an apocalyptic number.

12781660223 is a deficient number, since it is larger than the sum of its proper divisors (48321985).

12781660223 is an equidigital number, since it uses as much as digits as its factorization.

12781660223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39313.

The product of its (nonzero) digits is 48384, while the sum is 38.

The spelling of 12781660223 in words is "twelve billion, seven hundred eighty-one million, six hundred sixty thousand, two hundred twenty-three".