196984664640 has 448 divisors, whose sum is σ = 707998705920. Its totient is φ = 52193507328.

The previous prime is 196984664581. The next prime is 196984664663. The reversal of 196984664640 is 46466489691.

196984664640 is a `hidden beast` number, since 1 + 9 + 6 + 98 + 466 + 46 + 40 = 666.

196984664640 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 121071507 + ... + 121073133.

Almost surely, 2^196984664640 is an apocalyptic number.

196984664640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 196984664640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (353999352960).

196984664640 is an abundant number, since it is smaller than the sum of its proper divisors (511014041280).

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

196984664640 is an equidigital number, since it uses as much as digits as its factorization.

196984664640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1838 (or 1810 counting only the distinct ones).

The product of its (nonzero) digits is 53747712, while the sum is 63.

The spelling of 196984664640 in words is "one hundred ninety-six billion, nine hundred eighty-four million, six hundred sixty-four thousand, six hundred forty".