198615897329 has 2 divisors, whose sum is σ = 198615897330. Its totient is φ = 198615897328.

The previous prime is 198615897307. The next prime is 198615897407. The reversal of 198615897329 is 923798516891.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 193600000000 + 5015897329 = 440000^2 + 70823^2 .

It is a cyclic number.

It is not a de Polignac number, because 198615897329 - 2¹² = 198615893233 is a prime.

It is not a weakly prime, because it can be changed into another prime (198615897229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99307948664 + 99307948665.

It is an arithmetic number, because the mean of its divisors is an integer number (99307948665).

Almost surely, 2^198615897329 is an apocalyptic number.

It is an amenable number.

198615897329 is a deficient number, since it is larger than the sum of its proper divisors (1).

198615897329 is an equidigital number, since it uses as much as digits as its factorization.

198615897329 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 58786560, while the sum is 68.

The spelling of 198615897329 in words is "one hundred ninety-eight billion, six hundred fifteen million, eight hundred ninety-seven thousand, three hundred twenty-nine".