68724212068 has 6 divisors (see below), whose sum is σ = 120267371126. Its totient is φ = 34362106032.

The previous prime is 68724212059. The next prime is 68724212071. The reversal of 68724212068 is 86021242786.

It can be written as a sum of positive squares in only one way, i.e., 68501545984 + 222666084 = 261728^2 + 14922^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8590526505 + ... + 8590526512.

Almost surely, 2^68724212068 is an apocalyptic number.

It is an amenable number.

68724212068 is a deficient number, since it is larger than the sum of its proper divisors (51543159058).

68724212068 is a wasteful number, since it uses less digits than its factorization.

68724212068 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17181053021 (or 17181053019 counting only the distinct ones).

The product of its (nonzero) digits is 516096, while the sum is 46.

The spelling of 68724212068 in words is "sixty-eight billion, seven hundred twenty-four million, two hundred twelve thousand, sixty-eight".