196521886318 has 16 divisors (see below), whose sum is σ = 303304777776. Its totient is φ = 95445544320.

The previous prime is 196521886291. The next prime is 196521886397. The reversal of 196521886318 is 813688125691.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6296971 + ... + 6328102.

It is an arithmetic number, because the mean of its divisors is an integer number (18956548611).

Almost surely, 2^196521886318 is an apocalyptic number.

196521886318 is a deficient number, since it is larger than the sum of its proper divisors (106782891458).

196521886318 is a wasteful number, since it uses less digits than its factorization.

196521886318 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12625299.

The product of its digits is 4976640, while the sum is 58.

The spelling of 196521886318 in words is "one hundred ninety-six billion, five hundred twenty-one million, eight hundred eighty-six thousand, three hundred eighteen".