198135181356 has 48 divisors (see below), whose sum is σ = 559440516096. Its totient is φ = 53280048384.

The previous prime is 198135181351. The next prime is 198135181381. The reversal of 198135181356 is 653181531891.

It is a super-3 number, since 3×198135181356³ (a number of 35 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a junction number, because it is equal to n+sod(n) for n = 198135181299 and 198135181308.

It is not an unprimeable number, because it can be changed into a prime (198135181351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 69373636 + ... + 69376491.

It is an arithmetic number, because the mean of its divisors is an integer number (11655010752).

Almost surely, 2^198135181356 is an apocalyptic number.

It is an amenable number.

198135181356 is an abundant number, since it is smaller than the sum of its proper divisors (361305334740).

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

198135181356 is a wasteful number, since it uses less digits than its factorization.

198135181356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138750158 (or 138750156 counting only the distinct ones).

The product of its digits is 777600, while the sum is 51.

The spelling of 198135181356 in words is "one hundred ninety-eight billion, one hundred thirty-five million, one hundred eighty-one thousand, three hundred fifty-six".