68825815 has 4 divisors (see below), whose sum is σ = 82590984. Its totient is φ = 55060648.

The previous prime is 68825791. The next prime is 68825819. The reversal of 68825815 is 51852886.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68825815 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68825819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6882577 + ... + 6882586.

It is an arithmetic number, because the mean of its divisors is an integer number (20647746).

Almost surely, 2^68825815 is an apocalyptic number.

68825815 is a deficient number, since it is larger than the sum of its proper divisors (13765169).

68825815 is a wasteful number, since it uses less digits than its factorization.

68825815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13765168.

The product of its digits is 153600, while the sum is 43.

The square root of 68825815 is about 8296.1325326926. The cubic root of 68825815 is about 409.8111662645.

The spelling of 68825815 in words is "sixty-eight million, eight hundred twenty-five thousand, eight hundred fifteen".