67634844533 has 2 divisors, whose sum is σ = 67634844534. Its totient is φ = 67634844532.

The previous prime is 67634844481. The next prime is 67634844623. The reversal of 67634844533 is 33544843676.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 43366813009 + 24268031524 = 208247^2 + 155782^2 .

It is a cyclic number.

It is not a de Polignac number, because 67634844533 - 2⁶ = 67634844469 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (67634864533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33817422266 + 33817422267.

It is an arithmetic number, because the mean of its divisors is an integer number (33817422267).

Almost surely, 2^67634844533 is an apocalyptic number.

It is an amenable number.

67634844533 is a deficient number, since it is larger than the sum of its proper divisors (1).

67634844533 is an equidigital number, since it uses as much as digits as its factorization.

67634844533 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17418240, while the sum is 53.

The spelling of 67634844533 in words is "sixty-seven billion, six hundred thirty-four million, eight hundred forty-four thousand, five hundred thirty-three".