198934868566 has 32 divisors (see below), whose sum is σ = 360297123840. Its totient is φ = 80566424736.

The previous prime is 198934868543. The next prime is 198934868597. The reversal of 198934868566 is 665868439891.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5193550 + ... + 5231713.

It is an arithmetic number, because the mean of its divisors is an integer number (11259285120).

Almost surely, 2^198934868566 is an apocalyptic number.

198934868566 is a deficient number, since it is larger than the sum of its proper divisors (161362255274).

198934868566 is a wasteful number, since it uses less digits than its factorization.

198934868566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10425348.

The product of its digits is 537477120, while the sum is 73.

The spelling of 198934868566 in words is "one hundred ninety-eight billion, nine hundred thirty-four million, eight hundred sixty-eight thousand, five hundred sixty-six".