17668421745311 has 4 divisors (see below), whose sum is σ = 17780959463592. Its totient is φ = 17555884027032.

The previous prime is 17668421745307. The next prime is 17668421745313. The reversal of 17668421745311 is 11354712486671.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 17668421745311 - 2² = 17668421745307 is a prime.

It is a super-3 number, since 3×17668421745311³ (a number of 41 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (17668421745313) 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, 56268858905 + ... + 56268859218.

It is an arithmetic number, because the mean of its divisors is an integer number (4445239865898).

Almost surely, 2^{17668421745311} is an apocalyptic number.

17668421745311 is a deficient number, since it is larger than the sum of its proper divisors (112537718281).

17668421745311 is a wasteful number, since it uses less digits than its factorization.

17668421745311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112537718280.

The product of its digits is 6773760, while the sum is 56.

It can be divided in two parts, 1766842 and 1745311, that added together give a palindrome (3512153).

The spelling of 17668421745311 in words is "seventeen trillion, six hundred sixty-eight billion, four hundred twenty-one million, seven hundred forty-five thousand, three hundred eleven".