17031664561 has 2 divisors, whose sum is σ = 17031664562. Its totient is φ = 17031664560.

The previous prime is 17031664553. The next prime is 17031664567. The reversal of 17031664561 is 16546613071.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15590019600 + 1441644961 = 124860^2 + 37969^2 .

It is a cyclic number.

It is not a de Polignac number, because 17031664561 - 2³ = 17031664553 is a prime.

It is not a weakly prime, because it can be changed into another prime (17031664567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8515832280 + 8515832281.

It is an arithmetic number, because the mean of its divisors is an integer number (8515832281).

Almost surely, 2^17031664561 is an apocalyptic number.

It is an amenable number.

17031664561 is a deficient number, since it is larger than the sum of its proper divisors (1).

17031664561 is an equidigital number, since it uses as much as digits as its factorization.

17031664561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 90720, while the sum is 40.

The spelling of 17031664561 in words is "seventeen billion, thirty-one million, six hundred sixty-four thousand, five hundred sixty-one".