68725648 has 20 divisors (see below), whose sum is σ = 133744540. Its totient is φ = 34210944.

The previous prime is 68725607. The next prime is 68725649. The reversal of 68725648 is 84652786.

It can be written as a sum of positive squares in 2 ways, for example, as 54346384 + 14379264 = 7372^2 + 3792^2 .

It is a junction number, because it is equal to n+sod(n) for n = 68725598 and 68725607.

It is not an unprimeable number, because it can be changed into a prime (68725649) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5715 + ... + 13042.

It is an arithmetic number, because the mean of its divisors is an integer number (6687227).

Almost surely, 2^68725648 is an apocalyptic number.

It is an amenable number.

68725648 is a deficient number, since it is larger than the sum of its proper divisors (65018892).

68725648 is a wasteful number, since it uses less digits than its factorization.

68725648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18994 (or 18988 counting only the distinct ones).

The product of its digits is 645120, while the sum is 46.

The square root of 68725648 is about 8290.0933649748. The cubic root of 68725648 is about 409.6122608329.

It can be divided in two parts, 687 and 25648, that added together give a triangular number (26335 = T₂₂₉).

The spelling of 68725648 in words is "sixty-eight million, seven hundred twenty-five thousand, six hundred forty-eight".