6463646947 has 2 divisors, whose sum is σ = 6463646948. Its totient is φ = 6463646946.

The previous prime is 6463646929. The next prime is 6463646963. The reversal of 6463646947 is 7496463646.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6463646947 is a prime.

It is not a weakly prime, because it can be changed into another prime (6463646927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3231823473 + 3231823474.

It is an arithmetic number, because the mean of its divisors is an integer number (3231823474).

Almost surely, 2^6463646947 is an apocalyptic number.

6463646947 is a deficient number, since it is larger than the sum of its proper divisors (1).

6463646947 is an equidigital number, since it uses as much as digits as its factorization.

6463646947 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15676416, while the sum is 55.

The square root of 6463646947 is about 80396.8093085789. The cubic root of 6463646947 is about 1862.7698880821.

The spelling of 6463646947 in words is "six billion, four hundred sixty-three million, six hundred forty-six thousand, nine hundred forty-seven".