7717378452257 has 2 divisors, whose sum is σ = 7717378452258. Its totient is φ = 7717378452256.

The previous prime is 7717378452211. The next prime is 7717378452319. The reversal of 7717378452257 is 7522548737177.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7581877897441 + 135500554816 = 2753521^2 + 368104^2 .

It is a cyclic number.

It is not a de Polignac number, because 7717378452257 - 2⁶ = 7717378452193 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 7717378452193 and 7717378452202.

It is not a weakly prime, because it can be changed into another prime (7717378412257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3858689226128 + 3858689226129.

It is an arithmetic number, because the mean of its divisors is an integer number (3858689226129).

Almost surely, 2^{7717378452257} is an apocalyptic number.

It is an amenable number.

7717378452257 is a deficient number, since it is larger than the sum of its proper divisors (1).

7717378452257 is an equidigital number, since it uses as much as digits as its factorization.

7717378452257 is an evil number, because the sum of its binary digits is even.

The product of its digits is 161347200, while the sum is 65.

The spelling of 7717378452257 in words is "seven trillion, seven hundred seventeen billion, three hundred seventy-eight million, four hundred fifty-two thousand, two hundred fifty-seven".