13458278863217 has 2 divisors, whose sum is σ = 13458278863218. Its totient is φ = 13458278863216.

The previous prime is 13458278863207. The next prime is 13458278863243. The reversal of 13458278863217 is 71236887285431.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12811180891441 + 647097971776 = 3579271^2 + 804424^2 .

It is a cyclic number.

It is not a de Polignac number, because 13458278863217 - 2¹⁸ = 13458278601073 is a prime.

It is a super-2 number, since 2×13458278863217² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (13458278863207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6729139431608 + 6729139431609.

It is an arithmetic number, because the mean of its divisors is an integer number (6729139431609).

Almost surely, 2^{13458278863217} is an apocalyptic number.

It is an amenable number.

13458278863217 is a deficient number, since it is larger than the sum of its proper divisors (1).

13458278863217 is an equidigital number, since it uses as much as digits as its factorization.

13458278863217 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 108380160, while the sum is 65.

The spelling of 13458278863217 in words is "thirteen trillion, four hundred fifty-eight billion, two hundred seventy-eight million, eight hundred sixty-three thousand, two hundred seventeen".