198945559079 has 4 divisors (see below), whose sum is σ = 199202927976. Its totient is φ = 198688190184.

The previous prime is 198945559073. The next prime is 198945559093. The reversal of 198945559079 is 970955549891.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 198945559079 - 2¹⁶ = 198945493543 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198945559073) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 128683289 + ... + 128684834.

It is an arithmetic number, because the mean of its divisors is an integer number (49800731994).

Almost surely, 2^198945559079 is an apocalyptic number.

198945559079 is a deficient number, since it is larger than the sum of its proper divisors (257368897).

198945559079 is an equidigital number, since it uses as much as digits as its factorization.

198945559079 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257368896.

The product of its (nonzero) digits is 183708000, while the sum is 71.

The spelling of 198945559079 in words is "one hundred ninety-eight billion, nine hundred forty-five million, five hundred fifty-nine thousand, seventy-nine".