171006991628617 has 2 divisors, whose sum is σ = 171006991628618. Its totient is φ = 171006991628616.

The previous prime is 171006991628597. The next prime is 171006991628651. The reversal of 171006991628617 is 716826199600171.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 103033381087296 + 67973610541321 = 10150536^2 + 8244611^2 .

It is a cyclic number.

It is not a de Polignac number, because 171006991628617 - 2⁴³ = 162210898606409 is a prime.

It is a super-3 number, since 3×171006991628617³ (a number of 44 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (171006991628717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85503495814308 + 85503495814309.

It is an arithmetic number, because the mean of its divisors is an integer number (85503495814309).

Almost surely, 2^{171006991628617} is an apocalyptic number.

It is an amenable number.

171006991628617 is a deficient number, since it is larger than the sum of its proper divisors (1).

171006991628617 is an equidigital number, since it uses as much as digits as its factorization.

171006991628617 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13716864, while the sum is 64.

The spelling of 171006991628617 in words is "one hundred seventy-one trillion, six billion, nine hundred ninety-one million, six hundred twenty-eight thousand, six hundred seventeen".