68531618 has 8 divisors (see below), whose sum is σ = 102847212. Its totient is φ = 34249216.

The previous prime is 68531581. The next prime is 68531633. The reversal of 68531618 is 81613586.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 42081169 + 26450449 = 6487^2 + 5143^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2255 + ... + 11922.

Almost surely, 2^68531618 is an apocalyptic number.

68531618 is a deficient number, since it is larger than the sum of its proper divisors (34315594).

68531618 is a wasteful number, since it uses less digits than its factorization.

68531618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16596.

The product of its digits is 34560, while the sum is 38.

The square root of 68531618 is about 8278.3825714931. The cubic root of 68531618 is about 409.2264175974.

The spelling of 68531618 in words is "sixty-eight million, five hundred thirty-one thousand, six hundred eighteen".