133538640067409 has 4 divisors (see below), whose sum is σ = 134237795251200. Its totient is φ = 132839484883620.

The previous prime is 133538640067381. The next prime is 133538640067411. The reversal of 133538640067409 is 904760046835331.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 133538640067409 - 2⁸ = 133538640067153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133538640067909) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 349577591609 + ... + 349577591990.

It is an arithmetic number, because the mean of its divisors is an integer number (33559448812800).

Almost surely, 2^{133538640067409} is an apocalyptic number.

It is an amenable number.

133538640067409 is a deficient number, since it is larger than the sum of its proper divisors (699155183791).

133538640067409 is an equidigital number, since it uses as much as digits as its factorization.

133538640067409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 699155183790.

The product of its (nonzero) digits is 39191040, while the sum is 59.

The spelling of 133538640067409 in words is "one hundred thirty-three trillion, five hundred thirty-eight billion, six hundred forty million, sixty-seven thousand, four hundred nine".