68657691735 has 24 divisors (see below), whose sum is σ = 120233546160. Its totient is φ = 36239933952.

The previous prime is 68657691721. The next prime is 68657691743. The reversal of 68657691735 is 53719675686.

It is not a de Polignac number, because 68657691735 - 2⁵ = 68657691703 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7860205 + ... + 7868934.

It is an arithmetic number, because the mean of its divisors is an integer number (5009731090).

Almost surely, 2^68657691735 is an apocalyptic number.

68657691735 is a deficient number, since it is larger than the sum of its proper divisors (51575854425).

68657691735 is a wasteful number, since it uses less digits than its factorization.

68657691735 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15729247 (or 15729244 counting only the distinct ones).

The product of its digits is 57153600, while the sum is 63.

The spelling of 68657691735 in words is "sixty-eight billion, six hundred fifty-seven million, six hundred ninety-one thousand, seven hundred thirty-five".