198537987754 has 8 divisors (see below), whose sum is σ = 315325039428. Its totient is φ = 93429641280.

The previous prime is 198537987709. The next prime is 198537987773. The reversal of 198537987754 is 457789735891.

198537987754 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 183402345025 + 15135642729 = 428255^2 + 123027^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2919676257 + ... + 2919676324.

Almost surely, 2^198537987754 is an apocalyptic number.

198537987754 is a deficient number, since it is larger than the sum of its proper divisors (116787051674).

198537987754 is a wasteful number, since it uses less digits than its factorization.

198537987754 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5839352600.

The product of its digits is 533433600, while the sum is 73.

The spelling of 198537987754 in words is "one hundred ninety-eight billion, five hundred thirty-seven million, nine hundred eighty-seven thousand, seven hundred fifty-four".