68641851 has 8 divisors (see below), whose sum is σ = 96339520. Its totient is φ = 43352712.

The previous prime is 68641847. The next prime is 68641871. The reversal of 68641851 is 15814686.

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

It is not a de Polignac number, because 68641851 - 2² = 68641847 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68641841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 602065 + ... + 602178.

It is an arithmetic number, because the mean of its divisors is an integer number (12042440).

Almost surely, 2^68641851 is an apocalyptic number.

68641851 is a deficient number, since it is larger than the sum of its proper divisors (27697669).

68641851 is a wasteful number, since it uses less digits than its factorization.

68641851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1204265.

The product of its digits is 46080, while the sum is 39.

The square root of 68641851 is about 8285.0377790328. The cubic root of 68641851 is about 409.4457134105.

The spelling of 68641851 in words is "sixty-eight million, six hundred forty-one thousand, eight hundred fifty-one".