68616915 has 8 divisors (see below), whose sum is σ = 109787088. Its totient is φ = 36595680.

The previous prime is 68616881. The next prime is 68616959. The reversal of 68616915 is 51961686.

It is a happy number.

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

It is not a de Polignac number, because 68616915 - 2¹¹ = 68614867 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2287216 + ... + 2287245.

It is an arithmetic number, because the mean of its divisors is an integer number (13723386).

Almost surely, 2^68616915 is an apocalyptic number.

68616915 is a deficient number, since it is larger than the sum of its proper divisors (41170173).

68616915 is a wasteful number, since it uses less digits than its factorization.

68616915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4574469.

The product of its digits is 77760, while the sum is 42.

The square root of 68616915 is about 8283.5327608455. The cubic root of 68616915 is about 409.3961266800.

The spelling of 68616915 in words is "sixty-eight million, six hundred sixteen thousand, nine hundred fifteen".