64809000947 has 2 divisors, whose sum is σ = 64809000948. Its totient is φ = 64809000946.

The previous prime is 64809000917. The next prime is 64809000953. The reversal of 64809000947 is 74900090846.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 64809000947 - 2¹⁰ = 64808999923 is a prime.

It is not a weakly prime, because it can be changed into another prime (64809000917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32404500473 + 32404500474.

It is an arithmetic number, because the mean of its divisors is an integer number (32404500474).

Almost surely, 2^64809000947 is an apocalyptic number.

64809000947 is a deficient number, since it is larger than the sum of its proper divisors (1).

64809000947 is an equidigital number, since it uses as much as digits as its factorization.

64809000947 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 435456, while the sum is 47.

The spelling of 64809000947 in words is "sixty-four billion, eight hundred nine million, nine hundred forty-seven", and thus it is an aban number.