68378515 has 8 divisors (see below), whose sum is σ = 82867248. Its totient is φ = 54160800.

The previous prime is 68378509. The next prime is 68378521. The reversal of 68378515 is 51587386.

It is an interprime number because it is at equal distance from previous prime (68378509) and next prime (68378521).

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

It is not a de Polignac number, because 68378515 - 2⁵ = 68378483 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67197 + ... + 68206.

It is an arithmetic number, because the mean of its divisors is an integer number (10358406).

Almost surely, 2^68378515 is an apocalyptic number.

68378515 is a deficient number, since it is larger than the sum of its proper divisors (14488733).

68378515 is a wasteful number, since it uses less digits than its factorization.

68378515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135509.

The product of its digits is 201600, while the sum is 43.

The square root of 68378515 is about 8269.1302444695. The cubic root of 68378515 is about 408.9214464067.

The spelling of 68378515 in words is "sixty-eight million, three hundred seventy-eight thousand, five hundred fifteen".