68512068 has 30 divisors (see below), whose sum is σ = 179104926. Its totient is φ = 22837248.

The previous prime is 68512063. The next prime is 68512133. The reversal of 68512068 is 86021586.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 42928704 + 25583364 = 6552^2 + 5058^2 .

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (68512061) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 105405 + ... + 106052.

Almost surely, 2^68512068 is an apocalyptic number.

It is an amenable number.

68512068 is an abundant number, since it is smaller than the sum of its proper divisors (110592858).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

68512068 is a wasteful number, since it uses less digits than its factorization.

68512068 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211473 (or 211462 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The square root of 68512068 is about 8277.2017010582. The cubic root of 68512068 is about 409.1875005857.

The spelling of 68512068 in words is "sixty-eight million, five hundred twelve thousand, sixty-eight".