268716617805 has 8 divisors (see below), whose sum is σ = 429946588512. Its totient is φ = 143315529488.

The previous prime is 268716617797. The next prime is 268716617843. The reversal of 268716617805 is 508716617862.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 268716617805 - 2³ = 268716617797 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8957220579 + ... + 8957220608.

It is an arithmetic number, because the mean of its divisors is an integer number (53743323564).

Almost surely, 2^268716617805 is an apocalyptic number.

It is an amenable number.

268716617805 is a deficient number, since it is larger than the sum of its proper divisors (161229970707).

268716617805 is a wasteful number, since it uses less digits than its factorization.

268716617805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17914441195.

The product of its (nonzero) digits is 6773760, while the sum is 57.

Adding to 268716617805 its sum of digits (57), we get a palindrome (268716617862).

The spelling of 268716617805 in words is "two hundred sixty-eight billion, seven hundred sixteen million, six hundred seventeen thousand, eight hundred five".