133335881361 has 6 divisors (see below), whose sum is σ = 192596273090. Its totient is φ = 88890587568.

The previous prime is 133335881351. The next prime is 133335881369. The reversal of 133335881361 is 163188533331.

133335881361 is a `hidden beast` number, since 1 + 3 + 3 + 3 + 3 + 588 + 1 + 3 + 61 = 666.

It can be written as a sum of positive squares in only one way, i.e., 100453499136 + 32882382225 = 316944^2 + 181335^2 .

It is not a de Polignac number, because 133335881361 - 2¹⁹ = 133335357073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133335881369) 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 5 ways as a sum of consecutive naturals, for example, 7407548956 + ... + 7407548973.

Almost surely, 2^133335881361 is an apocalyptic number.

It is an amenable number.

133335881361 is a deficient number, since it is larger than the sum of its proper divisors (59260391729).

133335881361 is a wasteful number, since it uses less digits than its factorization.

133335881361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14815097935 (or 14815097932 counting only the distinct ones).

The product of its digits is 466560, while the sum is 45.

The spelling of 133335881361 in words is "one hundred thirty-three billion, three hundred thirty-five million, eight hundred eighty-one thousand, three hundred sixty-one".