198385007949 has 10 divisors (see below), whose sum is σ = 296352913230. Its totient is φ = 132256671912.

The previous prime is 198385007897. The next prime is 198385007981. The reversal of 198385007949 is 949700583891.

198385007949 is a `hidden beast` number, since 1 + 9 + 8 + 38 + 500 + 7 + 94 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 192683247849 + 5701760100 = 438957^2 + 75510^2 .

It is not a de Polignac number, because 198385007949 - 2²⁴ = 198368230733 is a prime.

It is a super-2 number, since 2×198385007949² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198385008949) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1224598734 + ... + 1224598895.

It is an arithmetic number, because the mean of its divisors is an integer number (29635291323).

Almost surely, 2^198385007949 is an apocalyptic number.

It is an amenable number.

198385007949 is a deficient number, since it is larger than the sum of its proper divisors (97967905281).

198385007949 is an equidigital number, since it uses as much as digits as its factorization.

198385007949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2449197641 (or 2449197632 counting only the distinct ones).

The product of its (nonzero) digits is 19595520, while the sum is 63.

The spelling of 198385007949 in words is "one hundred ninety-eight billion, three hundred eighty-five million, seven thousand, nine hundred forty-nine".