68505644 has 6 divisors (see below), whose sum is σ = 119884884. Its totient is φ = 34252820.

The previous prime is 68505643. The next prime is 68505673. The reversal of 68505644 is 44650586.

It is a junction number, because it is equal to n+sod(n) for n = 68505598 and 68505607.

It is not an unprimeable number, because it can be changed into a prime (68505641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8563202 + ... + 8563209.

It is an arithmetic number, because the mean of its divisors is an integer number (19980814).

Almost surely, 2^68505644 is an apocalyptic number.

It is an amenable number.

68505644 is a deficient number, since it is larger than the sum of its proper divisors (51379240).

68505644 is a wasteful number, since it uses less digits than its factorization.

68505644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17126415 (or 17126413 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 38.

The square root of 68505644 is about 8276.8136381098. The cubic root of 68505644 is about 409.1747110984.

The spelling of 68505644 in words is "sixty-eight million, five hundred five thousand, six hundred forty-four".