170605447775617 has 2 divisors, whose sum is σ = 170605447775618. Its totient is φ = 170605447775616.

The previous prime is 170605447775573. The next prime is 170605447775639. The reversal of 170605447775617 is 716577744506071.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 89388024066576 + 81217423709041 = 9454524^2 + 9012071^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-170605447775617 is a prime.

It is not a weakly prime, because it can be changed into another prime (170605447775117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85302723887808 + 85302723887809.

It is an arithmetic number, because the mean of its divisors is an integer number (85302723887809).

Almost surely, 2^{170605447775617} is an apocalyptic number.

It is an amenable number.

170605447775617 is a deficient number, since it is larger than the sum of its proper divisors (1).

170605447775617 is an equidigital number, since it uses as much as digits as its factorization.

170605447775617 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 242020800, while the sum is 67.

The spelling of 170605447775617 in words is "one hundred seventy trillion, six hundred five billion, four hundred forty-seven million, seven hundred seventy-five thousand, six hundred seventeen".