198945559073 has 2 divisors, whose sum is σ = 198945559074. Its totient is φ = 198945559072.

The previous prime is 198945559019. The next prime is 198945559093. The reversal of 198945559073 is 370955549891.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 198944545024 + 1014049 = 446032^2 + 1007^2 .

It is a cyclic number.

It is not a de Polignac number, because 198945559073 - 2²⁶ = 198878450209 is a prime.

It is not a weakly prime, because it can be changed into another prime (198945559093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99472779536 + 99472779537.

It is an arithmetic number, because the mean of its divisors is an integer number (99472779537).

Almost surely, 2^198945559073 is an apocalyptic number.

It is an amenable number.

198945559073 is a deficient number, since it is larger than the sum of its proper divisors (1).

198945559073 is an equidigital number, since it uses as much as digits as its factorization.

198945559073 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 61236000, while the sum is 65.

The spelling of 198945559073 in words is "one hundred ninety-eight billion, nine hundred forty-five million, five hundred fifty-nine thousand, seventy-three".