67564013773 has 2 divisors, whose sum is σ = 67564013774.
Its totient is φ = 67564013772.
The previous prime is 67564013771. The next prime is 67564013807. The reversal of 67564013773 is 37731046576.
67564013773 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.
It is a weak prime.
It can be written as a sum of positive squares in only one way, i.e., 57303741924 + 10260271849 = 239382^2 + 101293^2
It is a cyclic number.
It is not a de Polignac number, because 67564013773 - 21 = 67564013771 is a prime.
Together with 67564013771, it forms a pair of twin primes.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (67564013771) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33782006886 + 33782006887.
It is an arithmetic number, because the mean of its divisors is an integer number (33782006887).
Almost surely, 267564013773 is an apocalyptic number.
It is an amenable number.
67564013773 is a deficient number, since it is larger than the sum of its proper divisors (1).
67564013773 is an equidigital number, since it uses as much as digits as its factorization.
67564013773 is an evil number, because the sum of its binary digits is even.
The product of its (nonzero) digits is 2222640, while the sum is 49.
The spelling of 67564013773 in words is "sixty-seven billion, five hundred sixty-four million, thirteen thousand, seven hundred seventy-three".