197983656208 has 160 divisors (see below), whose sum is σ = 464741504640. Its totient is φ = 80711147520.

The previous prime is 197983656203. The next prime is 197983656209. The reversal of 197983656208 is 802656389791.

It is a self number, because there is not a number n which added to its sum of digits gives 197983656208.

It is not an unprimeable number, because it can be changed into a prime (197983656203) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7174918 + ... + 7202458.

It is an arithmetic number, because the mean of its divisors is an integer number (2904634404).

Almost surely, 2^197983656208 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 197983656208, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (232370752320).

197983656208 is an abundant number, since it is smaller than the sum of its proper divisors (266757848432).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

197983656208 is a wasteful number, since it uses less digits than its factorization.

197983656208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27705 (or 27699 counting only the distinct ones).

The product of its (nonzero) digits is 39191040, while the sum is 64.

The spelling of 197983656208 in words is "one hundred ninety-seven billion, nine hundred eighty-three million, six hundred fifty-six thousand, two hundred eight".