68633636 has 6 divisors (see below), whose sum is σ = 120108870. Its totient is φ = 34316816.

The previous prime is 68633627. The next prime is 68633639. The reversal of 68633636 is 63633686.

It can be written as a sum of positive squares in only one way, i.e., 61716736 + 6916900 = 7856^2 + 2630^2 .

It is a junction number, because it is equal to n+sod(n) for n = 68633593 and 68633602.

It is not an unprimeable number, because it can be changed into a prime (68633639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8579201 + ... + 8579208.

It is an arithmetic number, because the mean of its divisors is an integer number (20018145).

Almost surely, 2^68633636 is an apocalyptic number.

It is an amenable number.

68633636 is a deficient number, since it is larger than the sum of its proper divisors (51475234).

68633636 is a wasteful number, since it uses less digits than its factorization.

68633636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17158413 (or 17158411 counting only the distinct ones).

The product of its digits is 279936, while the sum is 41.

The square root of 68633636 is about 8284.5419909612. The cubic root of 68633636 is about 409.4293787174.

The spelling of 68633636 in words is "sixty-eight million, six hundred thirty-three thousand, six hundred thirty-six".