198057268881447 has 4 divisors (see below), whose sum is σ = 264076358508600. Its totient is φ = 132038179254296.

The previous prime is 198057268881421. The next prime is 198057268881491. The reversal of 198057268881447 is 744188862750891.

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 198057268881447 - 2⁶ = 198057268881383 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198057268881247) 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, 33009544813572 + ... + 33009544813577.

It is an arithmetic number, because the mean of its divisors is an integer number (66019089627150).

Almost surely, 2^{198057268881447} is an apocalyptic number.

198057268881447 is a deficient number, since it is larger than the sum of its proper divisors (66019089627153).

198057268881447 is an equidigital number, since it uses as much as digits as its factorization.

198057268881447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66019089627152.

The product of its (nonzero) digits is 1734082560, while the sum is 78.

The spelling of 198057268881447 in words is "one hundred ninety-eight trillion, fifty-seven billion, two hundred sixty-eight million, eight hundred eighty-one thousand, four hundred forty-seven".