133105661218 has 8 divisors (see below), whose sum is σ = 199960549020. Its totient is φ = 66452144880.

The previous prime is 133105661207. The next prime is 133105661231. The reversal of 133105661218 is 812166501331.

It can be written as a sum of positive squares in 2 ways, for example, as 127689731569 + 5415929649 = 357337^2 + 73593^2 .

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

It is a super-3 number, since 3×133105661218³ (a number of 34 digits) contains 333 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50341213 + ... + 50343856.

Almost surely, 2^133105661218 is an apocalyptic number.

133105661218 is a deficient number, since it is larger than the sum of its proper divisors (66854887802).

133105661218 is a wasteful number, since it uses less digits than its factorization.

133105661218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100685732.

The product of its (nonzero) digits is 25920, while the sum is 37.

The spelling of 133105661218 in words is "one hundred thirty-three billion, one hundred five million, six hundred sixty-one thousand, two hundred eighteen".