68515411 has 4 divisors (see below), whose sum is σ = 68637672. Its totient is φ = 68393152.

The previous prime is 68515409. The next prime is 68515441. The reversal of 68515411 is 11451586.

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

It is a cyclic number.

It is not a de Polignac number, because 68515411 - 2¹ = 68515409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68515441) 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, 60286 + ... + 61411.

It is an arithmetic number, because the mean of its divisors is an integer number (17159418).

Almost surely, 2^68515411 is an apocalyptic number.

68515411 is a deficient number, since it is larger than the sum of its proper divisors (122261).

68515411 is a wasteful number, since it uses less digits than its factorization.

68515411 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122260.

The product of its digits is 4800, while the sum is 31.

The square root of 68515411 is about 8277.4036388230. The cubic root of 68515411 is about 409.1941558198.

Adding to 68515411 its reverse (11451586), we get a palindrome (79966997).

The spelling of 68515411 in words is "sixty-eight million, five hundred fifteen thousand, four hundred eleven".