198697322440 has 64 divisors (see below), whose sum is σ = 449135616960. Its totient is φ = 79112144640.

The previous prime is 198697322431. The next prime is 198697322443. The reversal of 198697322440 is 44223796891.

It is not an unprimeable number, because it can be changed into a prime (198697322443) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10982682 + ... + 11000758.

It is an arithmetic number, because the mean of its divisors is an integer number (7017744015).

Almost surely, 2^198697322440 is an apocalyptic number.

198697322440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

198697322440 is an abundant number, since it is smaller than the sum of its proper divisors (250438294520).

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

198697322440 is a wasteful number, since it uses less digits than its factorization.

198697322440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19342 (or 19338 counting only the distinct ones).

The product of its (nonzero) digits is 5225472, while the sum is 55.

The spelling of 198697322440 in words is "one hundred ninety-eight billion, six hundred ninety-seven million, three hundred twenty-two thousand, four hundred forty".