198821225837 has 8 divisors (see below), whose sum is σ = 215058408096. Its totient is φ = 182718792432.

The previous prime is 198821225833. The next prime is 198821225843. The reversal of 198821225837 is 738522128891.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 198821225837 - 2² = 198821225833 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198821225833) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33684143 + ... + 33690044.

It is an arithmetic number, because the mean of its divisors is an integer number (26882301012).

Almost surely, 2^198821225837 is an apocalyptic number.

It is an amenable number.

198821225837 is a deficient number, since it is larger than the sum of its proper divisors (16237182259).

198821225837 is a wasteful number, since it uses less digits than its factorization.

198821225837 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67374427.

The product of its digits is 3870720, while the sum is 56.

The spelling of 198821225837 in words is "one hundred ninety-eight billion, eight hundred twenty-one million, two hundred twenty-five thousand, eight hundred thirty-seven".