68815415 has 8 divisors (see below), whose sum is σ = 82909008. Its totient is φ = 54832000.

The previous prime is 68815403. The next prime is 68815451. The reversal of 68815415 is 51451886.

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

It is not a de Polignac number, because 68815415 - 2¹⁰ = 68814391 is a prime.

It is a super-2 number, since 2×68815415² = 9471122683244450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

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, 26162 + ... + 28671.

It is an arithmetic number, because the mean of its divisors is an integer number (10363626).

Almost surely, 2^68815415 is an apocalyptic number.

68815415 is a deficient number, since it is larger than the sum of its proper divisors (14093593).

68815415 is a wasteful number, since it uses less digits than its factorization.

68815415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55089.

The product of its digits is 38400, while the sum is 38.

The square root of 68815415 is about 8295.5057109256. The cubic root of 68815415 is about 409.7905235700.

The spelling of 68815415 in words is "sixty-eight million, eight hundred fifteen thousand, four hundred fifteen".