68517643724 has 72 divisors (see below), whose sum is σ = 126976542000. Its totient is φ = 32345495424.

The previous prime is 68517643723. The next prime is 68517643757. The reversal of 68517643724 is 42734671586.

It is not an unprimeable number, because it can be changed into a prime (68517643723) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 96639482 + ... + 96640190.

Almost surely, 2^68517643724 is an apocalyptic number.

It is an amenable number.

68517643724 is a deficient number, since it is larger than the sum of its proper divisors (58458898276).

68517643724 is a wasteful number, since it uses less digits than its factorization.

68517643724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1287 (or 1262 counting only the distinct ones).

The product of its digits is 6773760, while the sum is 53.

The spelling of 68517643724 in words is "sixty-eight billion, five hundred seventeen million, six hundred forty-three thousand, seven hundred twenty-four".