198633336490 has 8 divisors (see below), whose sum is σ = 357540005700. Its totient is φ = 79453334592.

The previous prime is 198633336479. The next prime is 198633336511. The reversal of 198633336490 is 94633336891.

It is a Cunningham number, because it is equal to 445683²+1.

It can be written as a sum of positive squares in 2 ways, for example, as 198633336489 + 1 = 445683^2 + 1^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-3 number, since 3×198633336490³ (a number of 35 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9931666815 + ... + 9931666834.

Almost surely, 2^198633336490 is an apocalyptic number.

198633336490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

198633336490 is a deficient number, since it is larger than the sum of its proper divisors (158906669210).

198633336490 is a wasteful number, since it uses less digits than its factorization.

198633336490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19863333656.

The product of its (nonzero) digits is 7558272, while the sum is 55.

The spelling of 198633336490 in words is "one hundred ninety-eight billion, six hundred thirty-three million, three hundred thirty-six thousand, four hundred ninety".