68885615 has 8 divisors (see below), whose sum is σ = 87525360. Its totient is φ = 51866752.

The previous prime is 68885611. The next prime is 68885651. The reversal of 68885615 is 51658886.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 68885615 - 2² = 68885611 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 68885615.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68885611) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 405125 + ... + 405294.

It is an arithmetic number, because the mean of its divisors is an integer number (10940670).

Almost surely, 2^68885615 is an apocalyptic number.

68885615 is a deficient number, since it is larger than the sum of its proper divisors (18639745).

68885615 is a wasteful number, since it uses less digits than its factorization.

68885615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 810441.

The product of its digits is 460800, while the sum is 47.

The square root of 68885615 is about 8299.7358391698. The cubic root of 68885615 is about 409.9298214209.

The spelling of 68885615 in words is "sixty-eight million, eight hundred eighty-five thousand, six hundred fifteen".