196942851839 has 4 divisors (see below), whose sum is σ = 196972866456. Its totient is φ = 196912837224.

The previous prime is 196942851779. The next prime is 196942851841. The reversal of 196942851839 is 938158249691.

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

It is a cyclic number.

It is not a de Polignac number, because 196942851839 - 2⁸ = 196942851583 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 (196942851139) 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, 14997464 + ... + 15010589.

It is an arithmetic number, because the mean of its divisors is an integer number (49243216614).

Almost surely, 2^196942851839 is an apocalyptic number.

196942851839 is a deficient number, since it is larger than the sum of its proper divisors (30014617).

196942851839 is an equidigital number, since it uses as much as digits as its factorization.

196942851839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30014616.

The product of its digits is 33592320, while the sum is 65.

The spelling of 196942851839 in words is "one hundred ninety-six billion, nine hundred forty-two million, eight hundred fifty-one thousand, eight hundred thirty-nine".