196393957509 has 8 divisors (see below), whose sum is σ = 263305343392. Its totient is φ = 130205938320.

The previous prime is 196393957469. The next prime is 196393957517. The reversal of 196393957509 is 905759393691.

It is a happy number.

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

It is a de Polignac number, because none of the positive numbers 2^k-196393957509 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 196393957509.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (196393957559) 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, 180841039 + ... + 180842124.

It is an arithmetic number, because the mean of its divisors is an integer number (32913167924).

Almost surely, 2^196393957509 is an apocalyptic number.

It is an amenable number.

196393957509 is a deficient number, since it is larger than the sum of its proper divisors (66911385883).

196393957509 is a wasteful number, since it uses less digits than its factorization.

196393957509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 361683347.

The product of its (nonzero) digits is 62001450, while the sum is 66.

The spelling of 196393957509 in words is "one hundred ninety-six billion, three hundred ninety-three million, nine hundred fifty-seven thousand, five hundred nine".