67534023509 has 2 divisors, whose sum is σ = 67534023510. Its totient is φ = 67534023508.

The previous prime is 67534023481. The next prime is 67534023521. The reversal of 67534023509 is 90532043576.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 66823801009 + 710222500 = 258503^2 + 26650^2 .

It is a cyclic number.

It is not a de Polignac number, because 67534023509 - 2⁸ = 67534023253 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 67534023509.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (67534023589) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33767011754 + 33767011755.

It is an arithmetic number, because the mean of its divisors is an integer number (33767011755).

Almost surely, 2^67534023509 is an apocalyptic number.

It is an amenable number.

67534023509 is a deficient number, since it is larger than the sum of its proper divisors (1).

67534023509 is an equidigital number, since it uses as much as digits as its factorization.

67534023509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 680400, while the sum is 44.

The spelling of 67534023509 in words is "sixty-seven billion, five hundred thirty-four million, twenty-three thousand, five hundred nine".