6615617270257 has 2 divisors, whose sum is σ = 6615617270258. Its totient is φ = 6615617270256.

The previous prime is 6615617270243. The next prime is 6615617270303. The reversal of 6615617270257 is 7520727165166.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5228178283441 + 1387438986816 = 2286521^2 + 1177896^2 .

It is a cyclic number.

It is not a de Polignac number, because 6615617270257 - 2¹¹ = 6615617268209 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6615617270198 and 6615617270207.

It is not a weakly prime, because it can be changed into another prime (6615617250257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3307808635128 + 3307808635129.

It is an arithmetic number, because the mean of its divisors is an integer number (3307808635129).

Almost surely, 2^{6615617270257} is an apocalyptic number.

It is an amenable number.

6615617270257 is a deficient number, since it is larger than the sum of its proper divisors (1).

6615617270257 is an equidigital number, since it uses as much as digits as its factorization.

6615617270257 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7408800, while the sum is 55.

The spelling of 6615617270257 in words is "six trillion, six hundred fifteen billion, six hundred seventeen million, two hundred seventy thousand, two hundred fifty-seven".