199897696768 has 480 divisors, whose sum is σ = 525974549760. Its totient is φ = 75009392640.

The previous prime is 199897696753. The next prime is 199897696787. The reversal of 199897696768 is 867696798991.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1155477930 + ... + 1155478102.

It is an arithmetic number, because the mean of its divisors is an integer number (1095780312).

Almost surely, 2^199897696768 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 199897696768, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (262987274880).

199897696768 is an abundant number, since it is smaller than the sum of its proper divisors (326076852992).

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

199897696768 is a wasteful number, since it uses less digits than its factorization.

199897696768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 348 (or 325 counting only the distinct ones).

The product of its digits is 4444263936, while the sum is 85.

The spelling of 199897696768 in words is "one hundred ninety-nine billion, eight hundred ninety-seven million, six hundred ninety-six thousand, seven hundred sixty-eight".