196405521189 has 8 divisors (see below), whose sum is σ = 261881938560. Its totient is φ = 130933058976.

The previous prime is 196405521149. The next prime is 196405521227. The reversal of 196405521189 is 981125504691.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 196405521189 - 2¹⁹ = 196404996901 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (196405521119) 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, 870912 + ... + 1072985.

It is an arithmetic number, because the mean of its divisors is an integer number (32735242320).

Almost surely, 2^196405521189 is an apocalyptic number.

It is an amenable number.

196405521189 is a deficient number, since it is larger than the sum of its proper divisors (65476417371).

196405521189 is a wasteful number, since it uses less digits than its factorization.

196405521189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1977579.

The product of its (nonzero) digits is 777600, while the sum is 51.

The spelling of 196405521189 in words is "one hundred ninety-six billion, four hundred five million, five hundred twenty-one thousand, one hundred eighty-nine".