198057843968 has 18 divisors (see below), whose sum is σ = 395342024994. Its totient is φ = 99028921856.

The previous prime is 198057843947. The next prime is 198057843989. The reversal of 198057843968 is 869348750891.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (198057843947) and next prime (198057843989).

It can be written as a sum of positive squares in only one way, i.e., 100494072064 + 97563771904 = 317008^2 + 312352^2 .

It is a junction number, because it is equal to n+sod(n) for n = 198057843898 and 198057843907.

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, 386831471 + ... + 386831982.

It is an arithmetic number, because the mean of its divisors is an integer number (21963445833).

Almost surely, 2^198057843968 is an apocalyptic number.

It is an amenable number.

198057843968 is a deficient number, since it is larger than the sum of its proper divisors (197284181026).

198057843968 is an frugal number, since it uses more digits than its factorization.

198057843968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 773663469 (or 773663455 counting only the distinct ones).

The product of its (nonzero) digits is 104509440, while the sum is 68.

The spelling of 198057843968 in words is "one hundred ninety-eight billion, fifty-seven million, eight hundred forty-three thousand, nine hundred sixty-eight".