171642013613 has 6 divisors (see below), whose sum is σ = 199665199566. Its totient is φ = 147121725912.

The previous prime is 171642013489. The next prime is 171642013637. The reversal of 171642013613 is 316310246171.

It can be written as a sum of positive squares in only one way, i.e., 169997062249 + 1644951364 = 412307^2 + 40558^2 .

It is not a de Polignac number, because 171642013613 - 2¹⁸ = 171641751469 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (171642013813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1751449070 + ... + 1751449167.

It is an arithmetic number, because the mean of its divisors is an integer number (33277533261).

Almost surely, 2^171642013613 is an apocalyptic number.

It is an amenable number.

171642013613 is a deficient number, since it is larger than the sum of its proper divisors (28023185953).

171642013613 is an equidigital number, since it uses as much as digits as its factorization.

171642013613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3502898251 (or 3502898244 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 35.

Adding to 171642013613 its reverse (316310246171), we get a palindrome (487952259784).

The spelling of 171642013613 in words is "one hundred seventy-one billion, six hundred forty-two million, thirteen thousand, six hundred thirteen".