197099823647 has 16 divisors (see below), whose sum is σ = 209844375840. Its totient is φ = 184802980992.

The previous prime is 197099823619. The next prime is 197099823707. The reversal of 197099823647 is 746328990791.

It is not a de Polignac number, because 197099823647 - 2¹² = 197099819551 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (197099820647) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 241088 + ... + 672549.

It is an arithmetic number, because the mean of its divisors is an integer number (13115273490).

Almost surely, 2^197099823647 is an apocalyptic number.

197099823647 is a deficient number, since it is larger than the sum of its proper divisors (12744552193).

197099823647 is a wasteful number, since it uses less digits than its factorization.

197099823647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 913882.

The product of its (nonzero) digits is 41150592, while the sum is 65.

The spelling of 197099823647 in words is "one hundred ninety-seven billion, ninety-nine million, eight hundred twenty-three thousand, six hundred forty-seven".