17216117257 has 2 divisors, whose sum is σ = 17216117258. Its totient is φ = 17216117256.

The previous prime is 17216117203. The next prime is 17216117287. The reversal of 17216117257 is 75271161271.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16670941456 + 545175801 = 129116^2 + 23349^2 .

It is a cyclic number.

It is not a de Polignac number, because 17216117257 - 2¹⁵ = 17216084489 is a prime.

It is not a weakly prime, because it can be changed into another prime (17216117287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8608058628 + 8608058629.

It is an arithmetic number, because the mean of its divisors is an integer number (8608058629).

Almost surely, 2^17216117257 is an apocalyptic number.

It is an amenable number.

17216117257 is a deficient number, since it is larger than the sum of its proper divisors (1).

17216117257 is an equidigital number, since it uses as much as digits as its factorization.

17216117257 is an evil number, because the sum of its binary digits is even.

The product of its digits is 41160, while the sum is 40.

The spelling of 17216117257 in words is "seventeen billion, two hundred sixteen million, one hundred seventeen thousand, two hundred fifty-seven".