68516159 has 4 divisors (see below), whose sum is σ = 68596416. Its totient is φ = 68435904.

The previous prime is 68516101. The next prime is 68516167. The reversal of 68516159 is 95161586.

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 68516159 - 2⁸ = 68515903 is a prime.

It is a super-2 number, since 2×68516159² = 9388928088226562, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68516179) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38834 + ... + 40559.

It is an arithmetic number, because the mean of its divisors is an integer number (17149104).

Almost surely, 2^68516159 is an apocalyptic number.

68516159 is a deficient number, since it is larger than the sum of its proper divisors (80257).

68516159 is an equidigital number, since it uses as much as digits as its factorization.

68516159 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80256.

The product of its digits is 64800, while the sum is 41.

The square root of 68516159 is about 8277.4488219499. The cubic root of 68516159 is about 409.1956449063.

The spelling of 68516159 in words is "sixty-eight million, five hundred sixteen thousand, one hundred fifty-nine".