68159505 has 16 divisors (see below), whose sum is σ = 109255104. Its totient is φ = 36285120.

The previous prime is 68159467. The next prime is 68159527. The reversal of 68159505 is 50595186.

It is not a de Polignac number, because 68159505 - 2¹⁰ = 68158481 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4935 + ... + 12675.

It is an arithmetic number, because the mean of its divisors is an integer number (6828444).

Almost surely, 2^68159505 is an apocalyptic number.

It is an amenable number.

68159505 is a deficient number, since it is larger than the sum of its proper divisors (41095599).

68159505 is a wasteful number, since it uses less digits than its factorization.

68159505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8336.

The product of its (nonzero) digits is 54000, while the sum is 39.

The square root of 68159505 is about 8255.8769976302. The cubic root of 68159505 is about 408.4844003957.

The spelling of 68159505 in words is "sixty-eight million, one hundred fifty-nine thousand, five hundred five".