2171668352017 has 4 divisors (see below), whose sum is σ = 2241722169856. Its totient is φ = 2101614534180.

The previous prime is 2171668352003. The next prime is 2171668352027. The reversal of 2171668352017 is 7102538661712.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2171668352017 is a prime.

It is a super-3 number, since 3×2171668352017³ (a number of 38 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2171668352027) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35026908873 + ... + 35026908934.

It is an arithmetic number, because the mean of its divisors is an integer number (560430542464).

Almost surely, 2^{2171668352017} is an apocalyptic number.

It is an amenable number.

2171668352017 is a deficient number, since it is larger than the sum of its proper divisors (70053817839).

2171668352017 is an equidigital number, since it uses as much as digits as its factorization.

2171668352017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70053817838.

The product of its (nonzero) digits is 846720, while the sum is 49.

The spelling of 2171668352017 in words is "two trillion, one hundred seventy-one billion, six hundred sixty-eight million, three hundred fifty-two thousand, seventeen".