67564644607 has 2 divisors, whose sum is σ = 67564644608. Its totient is φ = 67564644606.

The previous prime is 67564644593. The next prime is 67564644673. The reversal of 67564644607 is 70644646576.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 67564644607 - 2¹¹ = 67564642559 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (67564644307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33782322303 + 33782322304.

It is an arithmetic number, because the mean of its divisors is an integer number (33782322304).

Almost surely, 2^67564644607 is an apocalyptic number.

67564644607 is a deficient number, since it is larger than the sum of its proper divisors (1).

67564644607 is an equidigital number, since it uses as much as digits as its factorization.

67564644607 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20321280, while the sum is 55.

The spelling of 67564644607 in words is "sixty-seven billion, five hundred sixty-four million, six hundred forty-four thousand, six hundred seven".