196865668646863 has 4 divisors (see below), whose sum is σ = 197089125706368. Its totient is φ = 196642211587360.

The previous prime is 196865668646819. The next prime is 196865668646909. The reversal of 196865668646863 is 368646866568691.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-196865668646863 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (196865668649863) 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, 111728528431 + ... + 111728530192.

It is an arithmetic number, because the mean of its divisors is an integer number (49272281426592).

Almost surely, 2^{196865668646863} is an apocalyptic number.

196865668646863 is a deficient number, since it is larger than the sum of its proper divisors (223457059505).

196865668646863 is an equidigital number, since it uses as much as digits as its factorization.

196865668646863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223457059504.

The product of its digits is 77396705280, while the sum is 88.

The spelling of 196865668646863 in words is "one hundred ninety-six trillion, eight hundred sixty-five billion, six hundred sixty-eight million, six hundred forty-six thousand, eight hundred sixty-three".