8713218744449 has 2 divisors, whose sum is σ = 8713218744450. Its totient is φ = 8713218744448.

The previous prime is 8713218744443. The next prime is 8713218744487. The reversal of 8713218744449 is 9444478123178.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8689123943824 + 24094800625 = 2947732^2 + 155225^2 .

It is a cyclic number.

It is not a de Polignac number, because 8713218744449 - 2²⁴ = 8713201967233 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 8713218744391 and 8713218744400.

It is not a weakly prime, because it can be changed into another prime (8713218744443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4356609372224 + 4356609372225.

It is an arithmetic number, because the mean of its divisors is an integer number (4356609372225).

Almost surely, 2^{8713218744449} is an apocalyptic number.

It is an amenable number.

8713218744449 is a deficient number, since it is larger than the sum of its proper divisors (1).

8713218744449 is an equidigital number, since it uses as much as digits as its factorization.

8713218744449 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 43352064, while the sum is 62.

The spelling of 8713218744449 in words is "eight trillion, seven hundred thirteen billion, two hundred eighteen million, seven hundred forty-four thousand, four hundred forty-nine".