68018251 has 8 divisors (see below), whose sum is σ = 78672384. Its totient is φ = 57598440.

The previous prime is 68018231. The next prime is 68018257. The reversal of 68018251 is 15281086.

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 68018251 - 2⁵ = 68018219 is a prime.

It is not an unprimeable number, because it can be changed into a prime (68018257) 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 7 ways as a sum of consecutive naturals, for example, 57955 + ... + 59116.

It is an arithmetic number, because the mean of its divisors is an integer number (9834048).

Almost surely, 2^68018251 is an apocalyptic number.

68018251 is a deficient number, since it is larger than the sum of its proper divisors (10654133).

68018251 is a wasteful number, since it uses less digits than its factorization.

68018251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117161.

The product of its (nonzero) digits is 3840, while the sum is 31.

The square root of 68018251 is about 8247.3178064144. The cubic root of 68018251 is about 408.2020237327.

The spelling of 68018251 in words is "sixty-eight million, eighteen thousand, two hundred fifty-one".