198686868706 has 4 divisors (see below), whose sum is σ = 298030303062. Its totient is φ = 99343434352.

The previous prime is 198686868689. The next prime is 198686868827. The reversal of 198686868706 is 607868686891.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 607868686891 = 6173 ⋅98472167.

It can be written as a sum of positive squares in only one way, i.e., 165615627681 + 33071241025 = 406959^2 + 181855^2 .

It is a super-2 number, since 2×198686868706² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49671717175 + ... + 49671717178.

Almost surely, 2^198686868706 is an apocalyptic number.

198686868706 is a deficient number, since it is larger than the sum of its proper divisors (99343434356).

198686868706 is an equidigital number, since it uses as much as digits as its factorization.

198686868706 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99343434355.

The product of its (nonzero) digits is 334430208, while the sum is 73.

The spelling of 198686868706 in words is "one hundred ninety-eight billion, six hundred eighty-six million, eight hundred sixty-eight thousand, seven hundred six".