798198891897 has 24 divisors (see below), whose sum is σ = 1170634982272. Its totient is φ = 483416635680.

The previous prime is 798198891887. The next prime is 798198891929.

It is a happy number.

798198891897 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 798198891897 - 2⁷ = 798198891769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (798198891857) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 256078 + ... + 1289175.

Almost surely, 2^798198891897 is an apocalyptic number.

It is an amenable number.

798198891897 is a deficient number, since it is larger than the sum of its proper divisors (372436090375).

798198891897 is a wasteful number, since it uses less digits than its factorization.

798198891897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1546701 (or 1546690 counting only the distinct ones).

The product of its digits is 1316818944, while the sum is 84.

The spelling of 798198891897 in words is "seven hundred ninety-eight billion, one hundred ninety-eight million, eight hundred ninety-one thousand, eight hundred ninety-seven".