197089851816 has 384 divisors, whose sum is σ = 656743127040. Its totient is φ = 52541913600.

The previous prime is 197089851799. The next prime is 197089851851. The reversal of 197089851816 is 618158980791.

197089851816 is a `hidden beast` number, since 19 + 7 + 0 + 8 + 98 + 518 + 16 = 666.

197089851816 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 72698701 + ... + 72701411.

It is an arithmetic number, because the mean of its divisors is an integer number (1710268560).

Almost surely, 2^197089851816 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 197089851816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (328371563520).

197089851816 is an abundant number, since it is smaller than the sum of its proper divisors (459653275224).

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

197089851816 is a wasteful number, since it uses less digits than its factorization.

197089851816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3077 (or 3070 counting only the distinct ones).

The product of its (nonzero) digits is 8709120, while the sum is 63.

The spelling of 197089851816 in words is "one hundred ninety-seven billion, eighty-nine million, eight hundred fifty-one thousand, eight hundred sixteen".