68743249978 has 16 divisors (see below), whose sum is σ = 111158885376. Its totient is φ = 31695626160.

The previous prime is 68743249973. The next prime is 68743249999. The reversal of 68743249978 is 87994234786.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (68743249973) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1308226 + ... + 1359757.

It is an arithmetic number, because the mean of its divisors is an integer number (6947430336).

Almost surely, 2^68743249978 is an apocalyptic number.

68743249978 is a deficient number, since it is larger than the sum of its proper divisors (42415635398).

68743249978 is a wasteful number, since it uses less digits than its factorization.

68743249978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2668989.

The product of its digits is 146313216, while the sum is 67.

The spelling of 68743249978 in words is "sixty-eight billion, seven hundred forty-three million, two hundred forty-nine thousand, nine hundred seventy-eight".