68018563 has 4 divisors (see below), whose sum is σ = 69171480. Its totient is φ = 66865648.

The previous prime is 68018539. The next prime is 68018591. The reversal of 68018563 is 36581086.

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 68018563 - 2⁹ = 68018051 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68018063) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 576370 + ... + 576487.

It is an arithmetic number, because the mean of its divisors is an integer number (17292870).

Almost surely, 2^68018563 is an apocalyptic number.

68018563 is a deficient number, since it is larger than the sum of its proper divisors (1152917).

68018563 is a wasteful number, since it uses less digits than its factorization.

68018563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1152916.

The product of its (nonzero) digits is 34560, while the sum is 37.

The square root of 68018563 is about 8247.3367216332. The cubic root of 68018563 is about 408.2026478732.

The spelling of 68018563 in words is "sixty-eight million, eighteen thousand, five hundred sixty-three".