7278054417817 has 2 divisors, whose sum is σ = 7278054417818. Its totient is φ = 7278054417816.

The previous prime is 7278054417779. The next prime is 7278054417839. The reversal of 7278054417817 is 7187144508727.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5301510855001 + 1976543562816 = 2302501^2 + 1405896^2 .

It is a cyclic number.

It is not a de Polignac number, because 7278054417817 - 2¹¹ = 7278054415769 is a prime.

It is a super-2 number, since 2×7278054417817² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (7278054417017) 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 as a sum of consecutive naturals, namely, 3639027208908 + 3639027208909.

It is an arithmetic number, because the mean of its divisors is an integer number (3639027208909).

Almost surely, 2^{7278054417817} is an apocalyptic number.

It is an amenable number.

7278054417817 is a deficient number, since it is larger than the sum of its proper divisors (1).

7278054417817 is an equidigital number, since it uses as much as digits as its factorization.

7278054417817 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24586240, while the sum is 61.

The spelling of 7278054417817 in words is "seven trillion, two hundred seventy-eight billion, fifty-four million, four hundred seventeen thousand, eight hundred seventeen".