198128671826 has 16 divisors (see below), whose sum is σ = 299143248768. Its totient is φ = 98415385200.

The previous prime is 198128671753. The next prime is 198128671841. The reversal of 198128671826 is 628176821891.

It is a super-3 number, since 3×198128671826³ (a number of 35 digits) contains 333 as substring.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 69671 + ... + 633333.

It is an arithmetic number, because the mean of its divisors is an integer number (18696453048).

Almost surely, 2^198128671826 is an apocalyptic number.

198128671826 is a deficient number, since it is larger than the sum of its proper divisors (101014576942).

198128671826 is a wasteful number, since it uses less digits than its factorization.

198128671826 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 564817.

The product of its digits is 4644864, while the sum is 59.

The spelling of 198128671826 in words is "one hundred ninety-eight billion, one hundred twenty-eight million, six hundred seventy-one thousand, eight hundred twenty-six".