196194694509 has 32 divisors (see below), whose sum is σ = 317562353280. Its totient is φ = 118725868800.

The previous prime is 196194694489. The next prime is 196194694559. The reversal of 196194694509 is 905496491691.

196194694509 is a `hidden beast` number, since 1 + 9 + 61 + 9 + 4 + 69 + 4 + 509 = 666.

It is not a de Polignac number, because 196194694509 - 2²⁴ = 196177917293 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (196194694559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 303372 + ... + 696005.

It is an arithmetic number, because the mean of its divisors is an integer number (9923823540).

Almost surely, 2^196194694509 is an apocalyptic number.

It is an amenable number.

196194694509 is a deficient number, since it is larger than the sum of its proper divisors (121367658771).

196194694509 is a wasteful number, since it uses less digits than its factorization.

196194694509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1000058 (or 1000052 counting only the distinct ones).

The product of its (nonzero) digits is 18895680, while the sum is 63.

The spelling of 196194694509 in words is "one hundred ninety-six billion, one hundred ninety-four million, six hundred ninety-four thousand, five hundred nine".