68617671686 has 4 divisors (see below), whose sum is σ = 102926507532. Its totient is φ = 34308835842.

The previous prime is 68617671673. The next prime is 68617671737.

68617671686 is nontrivially palindromic in base 10.

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

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17154417920 + ... + 17154417923.

It is an arithmetic number, because the mean of its divisors is an integer number (25731626883).

Almost surely, 2^68617671686 is an apocalyptic number.

68617671686 is a deficient number, since it is larger than the sum of its proper divisors (34308835846).

68617671686 is a wasteful number, since it uses less digits than its factorization.

68617671686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34308835845.

The product of its digits is 24385536, while the sum is 62.

The spelling of 68617671686 in words is "sixty-eight billion, six hundred seventeen million, six hundred seventy-one thousand, six hundred eighty-six".