68068881778 has 8 divisors (see below), whose sum is σ = 102126244572. Its totient is φ = 34026800256.

The previous prime is 68068881763. The next prime is 68068881779. The reversal of 68068881778 is 87718886086.

It can be written as a sum of positive squares in 2 ways, for example, as 67447725849 + 621155929 = 259707^2 + 24923^2 .

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 (68068881779) 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, 3809175 + ... + 3827002.

Almost surely, 2^68068881778 is an apocalyptic number.

68068881778 is a deficient number, since it is larger than the sum of its proper divisors (34057362794).

68068881778 is a wasteful number, since it uses less digits than its factorization.

68068881778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7640636.

The product of its (nonzero) digits is 57802752, while the sum is 67.

The spelling of 68068881778 in words is "sixty-eight billion, sixty-eight million, eight hundred eighty-one thousand, seven hundred seventy-eight".