197884688445 has 20 divisors (see below), whose sum is σ = 354726627420. Its totient is φ = 105538500288.

The previous prime is 197884688423. The next prime is 197884688473. The reversal of 197884688445 is 544886488791.

It is a happy number.

197884688445 is a `hidden beast` number, since 1 + 9 + 7 + 88 + 468 + 84 + 4 + 5 = 666.

197884688445 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 22433449284 + 175451239161 = 149778^2 + 418869^2 .

It is not a de Polignac number, because 197884688445 - 2¹⁰ = 197884687421 is a prime.

It is a congruent number.

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 19 ways as a sum of consecutive naturals, for example, 244301680 + ... + 244302489.

It is an arithmetic number, because the mean of its divisors is an integer number (17736331371).

Almost surely, 2^197884688445 is an apocalyptic number.

197884688445 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

197884688445 is a deficient number, since it is larger than the sum of its proper divisors (156841938975).

197884688445 is an equidigital number, since it uses as much as digits as its factorization.

197884688445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 488604186 (or 488604177 counting only the distinct ones).

The product of its digits is 495452160, while the sum is 72.

The spelling of 197884688445 in words is "one hundred ninety-seven billion, eight hundred eighty-four million, six hundred eighty-eight thousand, four hundred forty-five".