198494575226240 has 64 divisors (see below), whose sum is σ = 495157663236960. Its totient is φ = 75945750515712.

The previous prime is 198494575226231. The next prime is 198494575226243. The reversal of 198494575226240 is 42622575494891.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198494575226243) 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 7 ways as a sum of consecutive naturals, for example, 6742328189 + ... + 6742357628.

Almost surely, 2^{198494575226240} is an apocalyptic number.

198494575226240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

198494575226240 is an abundant number, since it is smaller than the sum of its proper divisors (296663088010720).

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

198494575226240 is a wasteful number, since it uses less digits than its factorization.

198494575226240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13484685859 (or 13484685847 counting only the distinct ones).

The product of its (nonzero) digits is 348364800, while the sum is 68.

The spelling of 198494575226240 in words is "one hundred ninety-eight trillion, four hundred ninety-four billion, five hundred seventy-five million, two hundred twenty-six thousand, two hundred forty".