133640761613 has 2 divisors, whose sum is σ = 133640761614. Its totient is φ = 133640761612.

The previous prime is 133640761601. The next prime is 133640761621. The reversal of 133640761613 is 316167046331.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 107913564004 + 25727197609 = 328502^2 + 160397^2 .

It is a cyclic number.

It is not a de Polignac number, because 133640761613 - 2⁶ = 133640761549 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (133640761663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66820380806 + 66820380807.

It is an arithmetic number, because the mean of its divisors is an integer number (66820380807).

Almost surely, 2^133640761613 is an apocalyptic number.

It is an amenable number.

133640761613 is a deficient number, since it is larger than the sum of its proper divisors (1).

133640761613 is an equidigital number, since it uses as much as digits as its factorization.

133640761613 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 163296, while the sum is 41.

The spelling of 133640761613 in words is "one hundred thirty-three billion, six hundred forty million, seven hundred sixty-one thousand, six hundred thirteen".