196560554321664 has 1296 divisors, whose sum is σ = 656787869206560. Its totient is φ = 58318417428480.

The previous prime is 196560554321653. The next prime is 196560554321701. The reversal of 196560554321664 is 466123455065691.

196560554321664 is a `hidden beast` number, since 1 + 9 + 6 + 5 + 6 + 0 + 5 + 543 + 21 + 6 + 64 = 666.

It is a tau number, because it is divible by the number of its divisors (1296).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 79675942959 + ... + 79675945425.

Almost surely, 2^{196560554321664} 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 196560554321664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (328393934603280).

196560554321664 is an abundant number, since it is smaller than the sum of its proper divisors (460227314884896).

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

196560554321664 is an frugal number, since it uses more digits than its factorization.

196560554321664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2650 (or 2615 counting only the distinct ones).

The product of its (nonzero) digits is 139968000, while the sum is 63.

The spelling of 196560554321664 in words is "one hundred ninety-six trillion, five hundred sixty billion, five hundred fifty-four million, three hundred twenty-one thousand, six hundred sixty-four".