68843549617 has 4 divisors (see below), whose sum is σ = 69169822576. Its totient is φ = 68517276660.

The previous prime is 68843549569. The next prime is 68843549629. The reversal of 68843549617 is 71694534886.

It is a happy number.

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 not a de Polignac number, because 68843549617 - 2³⁵ = 34483811249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68843549657) 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, 163136163 + ... + 163136584.

It is an arithmetic number, because the mean of its divisors is an integer number (17292455644).

Almost surely, 2^68843549617 is an apocalyptic number.

It is an amenable number.

68843549617 is a deficient number, since it is larger than the sum of its proper divisors (326272959).

68843549617 is a wasteful number, since it uses less digits than its factorization.

68843549617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 326272958.

The product of its digits is 34836480, while the sum is 61.

The spelling of 68843549617 in words is "sixty-eight billion, eight hundred forty-three million, five hundred forty-nine thousand, six hundred seventeen".