198045992479 has 4 divisors (see below), whose sum is σ = 199190767176. Its totient is φ = 196901217784.

The previous prime is 198045992461. The next prime is 198045992503. The reversal of 198045992479 is 974299540891.

198045992479 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 974299540891 = 155251 ⋅6275641.

It is a cyclic number.

It is not a de Polignac number, because 198045992479 - 2¹⁵ = 198045959711 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 (198045992449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 572387089 + ... + 572387434.

It is an arithmetic number, because the mean of its divisors is an integer number (49797691794).

Almost surely, 2^198045992479 is an apocalyptic number.

198045992479 is a deficient number, since it is larger than the sum of its proper divisors (1144774697).

198045992479 is a wasteful number, since it uses less digits than its factorization.

198045992479 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1144774696.

The product of its (nonzero) digits is 58786560, while the sum is 67.

The spelling of 198045992479 in words is "one hundred ninety-eight billion, forty-five million, nine hundred ninety-two thousand, four hundred seventy-nine".