68649378194 has 8 divisors (see below), whose sum is σ = 102975289200. Its totient is φ = 34324281796.

The previous prime is 68649378191. The next prime is 68649378199. The reversal of 68649378194 is 49187394686.

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

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 68649378194.

It is not an unprimeable number, because it can be changed into a prime (68649378191) 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, 94097 + ... + 382299.

It is an arithmetic number, because the mean of its divisors is an integer number (12871911150).

Almost surely, 2^68649378194 is an apocalyptic number.

68649378194 is a deficient number, since it is larger than the sum of its proper divisors (34325911006).

68649378194 is a wasteful number, since it uses less digits than its factorization.

68649378194 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 407304.

The product of its digits is 62705664, while the sum is 65.

The spelling of 68649378194 in words is "sixty-eight billion, six hundred forty-nine million, three hundred seventy-eight thousand, one hundred ninety-four".