68511 has 8 divisors (see below), whose sum is σ = 93744. Its totient is φ = 44480.

The previous prime is 68507. The next prime is 68521. The reversal of 68511 is 11586.

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

It is a cyclic number.

It is not a de Polignac number, because 68511 - 2² = 68507 is a prime.

68511 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68501) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 156 + ... + 401.

It is an arithmetic number, because the mean of its divisors is an integer number (11718).

2⁶⁸⁵¹¹ is an apocalyptic number.

68511 is a deficient number, since it is larger than the sum of its proper divisors (25233).

68511 is a wasteful number, since it uses less digits than its factorization.

68511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 601.

The product of its digits is 240, while the sum is 21.

The square root of 68511 is about 261.7460601423. The cubic root of 68511 is about 40.9185374369.

It can be divided in two parts, 685 and 11, that added together give a palindrome (696).

The spelling of 68511 in words is "sixty-eight thousand, five hundred eleven".