198884550679 has 4 divisors (see below), whose sum is σ = 199658420784. Its totient is φ = 198110680576.

The previous prime is 198884550673. The next prime is 198884550691. The reversal of 198884550679 is 976055488891.

198884550679 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.

It is a cyclic number.

It is not a de Polignac number, because 198884550679 - 2¹⁹ = 198884026391 is a prime.

It is a super-2 number, since 2×198884550679² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198884550673) 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, 386934667 + ... + 386935180.

It is an arithmetic number, because the mean of its divisors is an integer number (49914605196).

Almost surely, 2^198884550679 is an apocalyptic number.

198884550679 is a deficient number, since it is larger than the sum of its proper divisors (773870105).

198884550679 is an equidigital number, since it uses as much as digits as its factorization.

198884550679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 773870104.

The product of its (nonzero) digits is 174182400, while the sum is 70.

The spelling of 198884550679 in words is "one hundred ninety-eight billion, eight hundred eighty-four million, five hundred fifty thousand, six hundred seventy-nine".