198227042658 has 54 divisors (see below), whose sum is σ = 456316209219. Its totient is φ = 62178801792.

The previous prime is 198227042653. The next prime is 198227042677. The reversal of 198227042658 is 856240722891.

198227042658 is a `hidden beast` number, since 198 + 2 + 27 + 0 + 426 + 5 + 8 = 666.

It can be written as a sum of positive squares in 5 ways, for example, as 28023764409 + 170203278249 = 167403^2 + 412557^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=314823.

It is not an unprimeable number, because it can be changed into a prime (198227042653) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 32108860 + ... + 32115032.

Almost surely, 2^198227042658 is an apocalyptic number.

198227042658 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 198227042658

198227042658 is an abundant number, since it is smaller than the sum of its proper divisors (258089166561).

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

198227042658 is an frugal number, since it uses more digits than its factorization.

198227042658 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12388 (or 6195 counting only the distinct ones).

The product of its (nonzero) digits is 3870720, while the sum is 54.

The spelling of 198227042658 in words is "one hundred ninety-eight billion, two hundred twenty-seven million, forty-two thousand, six hundred fifty-eight".