68518737686 has 16 divisors (see below), whose sum is σ = 117566635680. Its totient is φ = 29338687680.

The previous prime is 68518737649. The next prime is 68518737713. The reversal of 68518737686 is 68673781586.

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, 2191055 + ... + 2222106.

It is an arithmetic number, because the mean of its divisors is an integer number (7347914730).

Almost surely, 2^68518737686 is an apocalyptic number.

68518737686 is a deficient number, since it is larger than the sum of its proper divisors (49047897994).

68518737686 is a wasteful number, since it uses less digits than its factorization.

68518737686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4414279.

The product of its digits is 81285120, while the sum is 65.

The spelling of 68518737686 in words is "sixty-eight billion, five hundred eighteen million, seven hundred thirty-seven thousand, six hundred eighty-six".