194020643198 has 4 divisors (see below), whose sum is σ = 291030964800. Its totient is φ = 97010321598.

The previous prime is 194020643189. The next prime is 194020643231. The reversal of 194020643198 is 891346020491.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 891346020491 = 13649 ⋅65304859.

It is a congruent number.

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 as a sum of consecutive naturals, namely, 48505160798 + ... + 48505160801.

It is an arithmetic number, because the mean of its divisors is an integer number (72757741200).

Almost surely, 2^194020643198 is an apocalyptic number.

194020643198 is a deficient number, since it is larger than the sum of its proper divisors (97010321602).

194020643198 is an equidigital number, since it uses as much as digits as its factorization.

194020643198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97010321601.

The product of its (nonzero) digits is 373248, while the sum is 47.

The spelling of 194020643198 in words is "one hundred ninety-four billion, twenty million, six hundred forty-three thousand, one hundred ninety-eight".