68161618 has 8 divisors (see below), whose sum is σ = 116848512. Its totient is φ = 29212116.

The previous prime is 68161603. The next prime is 68161631. The reversal of 68161618 is 81616186.

It is a happy number.

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, 2434330 + ... + 2434357.

It is an arithmetic number, because the mean of its divisors is an integer number (14606064).

Almost surely, 2^68161618 is an apocalyptic number.

68161618 is a deficient number, since it is larger than the sum of its proper divisors (48686894).

68161618 is a wasteful number, since it uses less digits than its factorization.

68161618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4868696.

The product of its digits is 13824, while the sum is 37.

The square root of 68161618 is about 8256.0049660838. The cubic root of 68161618 is about 408.4886214681.

The spelling of 68161618 in words is "sixty-eight million, one hundred sixty-one thousand, six hundred eighteen".