197800668569 has 4 divisors (see below), whose sum is σ = 226057906944. Its totient is φ = 169543430196.

The previous prime is 197800668563. The next prime is 197800668601. The reversal of 197800668569 is 965866008791.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 965866008791 = 19219 ⋅50255789.

It is not a de Polignac number, because 197800668569 - 2¹² = 197800664473 is a prime.

It is a super-2 number, since 2×197800668569² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (197800668563) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14128619177 + ... + 14128619190.

It is an arithmetic number, because the mean of its divisors is an integer number (56514476736).

Almost surely, 2^197800668569 is an apocalyptic number.

It is an amenable number.

197800668569 is a deficient number, since it is larger than the sum of its proper divisors (28257238375).

197800668569 is an equidigital number, since it uses as much as digits as its factorization.

197800668569 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28257238374.

The product of its (nonzero) digits is 39191040, while the sum is 65.

The spelling of 197800668569 in words is "one hundred ninety-seven billion, eight hundred million, six hundred sixty-eight thousand, five hundred sixty-nine".