68641618 has 8 divisors (see below), whose sum is σ = 103653900. Its totient is φ = 34090320.

The previous prime is 68641609. The next prime is 68641619. The reversal of 68641618 is 81614686.

It can be written as a sum of positive squares in 2 ways, for example, as 67782289 + 859329 = 8233^2 + 927^2 .

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

It is not an unprimeable number, because it can be changed into a prime (68641619) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 114873 + ... + 115468.

Almost surely, 2^68641618 is an apocalyptic number.

68641618 is a deficient number, since it is larger than the sum of its proper divisors (35012282).

68641618 is a wasteful number, since it uses less digits than its factorization.

68641618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 230492.

The product of its digits is 55296, while the sum is 40.

The square root of 68641618 is about 8285.0237175279. The cubic root of 68641618 is about 409.4452501317.

The spelling of 68641618 in words is "sixty-eight million, six hundred forty-one thousand, six hundred eighteen".