196211944636778 has 16 divisors (see below), whose sum is σ = 338307630393600. Its totient is φ = 83604759233136.

The previous prime is 196211944636769. The next prime is 196211944636793. The reversal of 196211944636778 is 877636449112691.

196211944636778 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40506179378 + ... + 40506184221.

It is an arithmetic number, because the mean of its divisors is an integer number (21144226899600).

Almost surely, 2^{196211944636778} is an apocalyptic number.

196211944636778 is a deficient number, since it is larger than the sum of its proper divisors (142095685756822).

196211944636778 is a wasteful number, since it uses less digits than its factorization.

196211944636778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81012363781.

The product of its digits is 658409472, while the sum is 74.

The spelling of 196211944636778 in words is "one hundred ninety-six trillion, two hundred eleven billion, nine hundred forty-four million, six hundred thirty-six thousand, seven hundred seventy-eight".