196943951889 has 12 divisors (see below), whose sum is σ = 284494611856. Its totient is φ = 131286730392.

The previous prime is 196943951881. The next prime is 196943951921. The reversal of 196943951889 is 988159349691.

196943951889 is a `hidden beast` number, since 1 + 9 + 6 + 9 + 439 + 5 + 188 + 9 = 666.

It is not a de Polignac number, because 196943951889 - 2³ = 196943951881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (196943951881) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 633499 + ... + 891744.

Almost surely, 2^196943951889 is an apocalyptic number.

It is an amenable number.

196943951889 is a deficient number, since it is larger than the sum of its proper divisors (87550659967).

196943951889 is a wasteful number, since it uses less digits than its factorization.

196943951889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1539596 (or 1539593 counting only the distinct ones).

The product of its digits is 151165440, while the sum is 72.

The spelling of 196943951889 in words is "one hundred ninety-six billion, nine hundred forty-three million, nine hundred fifty-one thousand, eight hundred eighty-nine".