133681613243 has 2 divisors, whose sum is σ = 133681613244. Its totient is φ = 133681613242.

The previous prime is 133681613213. The next prime is 133681613267. The reversal of 133681613243 is 342316186331.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 133681613243 - 2¹⁶ = 133681547707 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 133681613243.

It is not a weakly prime, because it can be changed into another prime (133681613213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66840806621 + 66840806622.

It is an arithmetic number, because the mean of its divisors is an integer number (66840806622).

Almost surely, 2^133681613243 is an apocalyptic number.

133681613243 is a deficient number, since it is larger than the sum of its proper divisors (1).

133681613243 is an equidigital number, since it uses as much as digits as its factorization.

133681613243 is an evil number, because the sum of its binary digits is even.

The product of its digits is 186624, while the sum is 41.

Adding to 133681613243 its reverse (342316186331), we get a palindrome (475997799574).

The spelling of 133681613243 in words is "one hundred thirty-three billion, six hundred eighty-one million, six hundred thirteen thousand, two hundred forty-three".