17000020351661 has 2 divisors, whose sum is σ = 17000020351662. Its totient is φ = 17000020351660.

The previous prime is 17000020351597. The next prime is 17000020351723. The reversal of 17000020351661 is 16615302000071.

17000020351661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13159227829225 + 3840792522436 = 3627565^2 + 1959794^2 .

It is a cyclic number.

It is not a de Polignac number, because 17000020351661 - 2⁶ = 17000020351597 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (17000020251661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8500010175830 + 8500010175831.

It is an arithmetic number, because the mean of its divisors is an integer number (8500010175831).

Almost surely, 2^{17000020351661} is an apocalyptic number.

It is an amenable number.

17000020351661 is a deficient number, since it is larger than the sum of its proper divisors (1).

17000020351661 is an equidigital number, since it uses as much as digits as its factorization.

17000020351661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7560, while the sum is 32.

The spelling of 17000020351661 in words is "seventeen trillion, twenty million, three hundred fifty-one thousand, six hundred sixty-one".