198880904869 has 12 divisors (see below), whose sum is σ = 212810095044. Its totient is φ = 185815698944.

The previous prime is 198880904863. The next prime is 198880904917. The reversal of 198880904869 is 968409088891.

It can be written as a sum of positive squares in 6 ways, for example, as 63585674244 + 135295230625 = 252162^2 + 367825^2 .

It is not a de Polignac number, because 198880904869 - 2⁵ = 198880904837 is a prime.

It is a super-2 number, since 2×198880904869² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 198880904798 and 198880904807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198880904863) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2471974 + ... + 2551159.

It is an arithmetic number, because the mean of its divisors is an integer number (17734174587).

Almost surely, 2^198880904869 is an apocalyptic number.

It is an amenable number.

198880904869 is a deficient number, since it is larger than the sum of its proper divisors (13929190175).

198880904869 is a wasteful number, since it uses less digits than its factorization.

198880904869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5023304 (or 5023287 counting only the distinct ones).

The product of its (nonzero) digits is 71663616, while the sum is 70.

The spelling of 198880904869 in words is "one hundred ninety-eight billion, eight hundred eighty million, nine hundred four thousand, eight hundred sixty-nine".