198239607994 has 4 divisors (see below), whose sum is σ = 297359411994. Its totient is φ = 99119803996.

The previous prime is 198239607983. The next prime is 198239608009. The reversal of 198239607994 is 499706932891.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 161293001769 + 36946606225 = 401613^2 + 192215^2 .

It is a super-2 number, since 2×198239607994² (a number of 23 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (67) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49559901997 + ... + 49559902000.

Almost surely, 2^198239607994 is an apocalyptic number.

198239607994 is a deficient number, since it is larger than the sum of its proper divisors (99119804000).

198239607994 is an equidigital number, since it uses as much as digits as its factorization.

198239607994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99119803999.

The product of its (nonzero) digits is 52907904, while the sum is 67.

The spelling of 198239607994 in words is "one hundred ninety-eight billion, two hundred thirty-nine million, six hundred seven thousand, nine hundred ninety-four".