133538640067381 has 2 divisors, whose sum is σ = 133538640067382. Its totient is φ = 133538640067380.

The previous prime is 133538640067307. The next prime is 133538640067411. The reversal of 133538640067381 is 183760046835331.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 81170477605156 + 52368162462225 = 9009466^2 + 7236585^2 .

It is a cyclic number.

It is not a de Polignac number, because 133538640067381 - 2¹⁹ = 133538639543093 is a prime.

It is a super-2 number, since 2×133538640067381² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (133538640067981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66769320033690 + 66769320033691.

It is an arithmetic number, because the mean of its divisors is an integer number (66769320033691).

Almost surely, 2^{133538640067381} is an apocalyptic number.

It is an amenable number.

133538640067381 is a deficient number, since it is larger than the sum of its proper divisors (1).

133538640067381 is an equidigital number, since it uses as much as digits as its factorization.

133538640067381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 26127360, while the sum is 58.

The spelling of 133538640067381 in words is "one hundred thirty-three trillion, five hundred thirty-eight billion, six hundred forty million, sixty-seven thousand, three hundred eighty-one".