198197695656 has 96 divisors (see below), whose sum is σ = 548800237440. Its totient is φ = 64590200064.

The previous prime is 198197695637. The next prime is 198197695667. The reversal of 198197695656 is 656596791891.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3139555 + ... + 3202061.

It is an arithmetic number, because the mean of its divisors is an integer number (5716669140).

Almost surely, 2^198197695656 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 198197695656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (274400118720).

198197695656 is an abundant number, since it is smaller than the sum of its proper divisors (350602541784).

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

198197695656 is a wasteful number, since it uses less digits than its factorization.

198197695656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63503 (or 63496 counting only the distinct ones).

The product of its digits is 220449600, while the sum is 72.

The spelling of 198197695656 in words is "one hundred ninety-eight billion, one hundred ninety-seven million, six hundred ninety-five thousand, six hundred fifty-six".