198446130809 has 2 divisors, whose sum is σ = 198446130810. Its totient is φ = 198446130808.

The previous prime is 198446130761. The next prime is 198446130811. The reversal of 198446130809 is 908031644891.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 143032970809 + 55413160000 = 378197^2 + 235400^2 .

It is a cyclic number.

It is not a de Polignac number, because 198446130809 - 2²⁴ = 198429353593 is a prime.

It is a super-3 number, since 3×198446130809³ (a number of 35 digits) contains 333 as substring.

Together with 198446130811, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (198446130109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99223065404 + 99223065405.

It is an arithmetic number, because the mean of its divisors is an integer number (99223065405).

Almost surely, 2^198446130809 is an apocalyptic number.

It is an amenable number.

198446130809 is a deficient number, since it is larger than the sum of its proper divisors (1).

198446130809 is an equidigital number, since it uses as much as digits as its factorization.

198446130809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1492992, while the sum is 53.

The spelling of 198446130809 in words is "one hundred ninety-eight billion, four hundred forty-six million, one hundred thirty thousand, eight hundred nine".