68641608 has 128 divisors (see below), whose sum is σ = 206726400. Its totient is φ = 18579456.

The previous prime is 68641607. The next prime is 68641609. The reversal of 68641608 is 80614686.

It is an interprime number because it is at equal distance from previous prime (68641607) and next prime (68641609).

It is not an unprimeable number, because it can be changed into a prime (68641607) 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 31 ways as a sum of consecutive naturals, for example, 355560 + ... + 355752.

It is an arithmetic number, because the mean of its divisors is an integer number (1615050).

Almost surely, 2^68641608 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 68641608, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (103363200).

68641608 is an abundant number, since it is smaller than the sum of its proper divisors (138084792).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

68641608 is a wasteful number, since it uses less digits than its factorization.

68641608 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 311 (or 307 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 39.

The square root of 68641608 is about 8285.0231140293. The cubic root of 68641608 is about 409.4452302484.

The spelling of 68641608 in words is "sixty-eight million, six hundred forty-one thousand, six hundred eight".