6478905947 has 2 divisors, whose sum is σ = 6478905948. Its totient is φ = 6478905946.

The previous prime is 6478905941. The next prime is 6478905967. The reversal of 6478905947 is 7495098746.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6478905947 - 2¹⁶ = 6478840411 is a prime.

It is not a weakly prime, because it can be changed into another prime (6478905941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3239452973 + 3239452974.

It is an arithmetic number, because the mean of its divisors is an integer number (3239452974).

Almost surely, 2^6478905947 is an apocalyptic number.

6478905947 is a deficient number, since it is larger than the sum of its proper divisors (1).

6478905947 is an equidigital number, since it uses as much as digits as its factorization.

6478905947 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15240960, while the sum is 59.

The square root of 6478905947 is about 80491.6514118079. The cubic root of 6478905947 is about 1864.2345755359.

The spelling of 6478905947 in words is "six billion, four hundred seventy-eight million, nine hundred five thousand, nine hundred forty-seven".