2168143817 has 10 divisors (see below), whose sum is σ = 2529353418. Its totient is φ = 1858406928.

The previous prime is 2168143811. The next prime is 2168143843. The reversal of 2168143817 is 7183418612.

It can be written as a sum of positive squares in only one way, i.e., 2139617536 + 28526281 = 46256^2 + 5341^2 .

It is not a de Polignac number, because 2168143817 - 2¹⁰ = 2168142793 is a prime.

It is a super-2 number, since 2×2168143817² = 9401695222390658978, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2168143811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 449108 + ... + 453909.

Almost surely, 2^2168143817 is an apocalyptic number.

It is an amenable number.

2168143817 is a deficient number, since it is larger than the sum of its proper divisors (361209601).

2168143817 is an frugal number, since it uses more digits than its factorization.

2168143817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 903045 (or 903024 counting only the distinct ones).

The product of its digits is 64512, while the sum is 41.

The square root of 2168143817 is about 46563.3312489560. The cubic root of 2168143817 is about 1294.2833434296.

The spelling of 2168143817 in words is "two billion, one hundred sixty-eight million, one hundred forty-three thousand, eight hundred seventeen".