198603891255 has 128 divisors (see below), whose sum is σ = 402661933056. Its totient is φ = 81190771200.

The previous prime is 198603891251. The next prime is 198603891281. The reversal of 198603891255 is 552198306891.

It is a happy number.

It is not a de Polignac number, because 198603891255 - 2² = 198603891251 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 198603891195 and 198603891204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198603891251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 39933949 + ... + 39938921.

It is an arithmetic number, because the mean of its divisors is an integer number (3145796352).

Almost surely, 2^198603891255 is an apocalyptic number.

198603891255 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

198603891255 is an abundant number, since it is smaller than the sum of its proper divisors (204058041801).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

198603891255 is a wasteful number, since it uses less digits than its factorization.

198603891255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5557.

The product of its (nonzero) digits is 4665600, while the sum is 57.

The spelling of 198603891255 in words is "one hundred ninety-eight billion, six hundred three million, eight hundred ninety-one thousand, two hundred fifty-five".