198441407557 has 8 divisors (see below), whose sum is σ = 199832316992. Its totient is φ = 197051508000.

The previous prime is 198441407543. The next prime is 198441407561. The reversal of 198441407557 is 755704144891.

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 198441407557 - 2¹¹ = 198441405509 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 198441407498 and 198441407507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198441407257) 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, 144082 + ... + 646252.

It is an arithmetic number, because the mean of its divisors is an integer number (24979039624).

Almost surely, 2^198441407557 is an apocalyptic number.

It is an amenable number.

198441407557 is a deficient number, since it is larger than the sum of its proper divisors (1390909435).

198441407557 is a wasteful number, since it uses less digits than its factorization.

198441407557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 504939.

The product of its (nonzero) digits is 5644800, while the sum is 55.

The spelling of 198441407557 in words is "one hundred ninety-eight billion, four hundred forty-one million, four hundred seven thousand, five hundred fifty-seven".