12718821662259 has 4 divisors (see below), whose sum is σ = 16958428883016. Its totient is φ = 8479214441504.

The previous prime is 12718821662257. The next prime is 12718821662269. The reversal of 12718821662259 is 95226612881721.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12718821662259 - 2¹ = 12718821662257 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12718821662257) 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, 2119803610374 + ... + 2119803610379.

It is an arithmetic number, because the mean of its divisors is an integer number (4239607220754).

Almost surely, 2^{12718821662259} is an apocalyptic number.

12718821662259 is a deficient number, since it is larger than the sum of its proper divisors (4239607220757).

12718821662259 is an equidigital number, since it uses as much as digits as its factorization.

12718821662259 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4239607220756.

The product of its digits is 11612160, while the sum is 60.

The spelling of 12718821662259 in words is "twelve trillion, seven hundred eighteen billion, eight hundred twenty-one million, six hundred sixty-two thousand, two hundred fifty-nine".