6478905965 has 16 divisors (see below), whose sum is σ = 8976963072. Its totient is φ = 4396875264.

The previous prime is 6478905947. The next prime is 6478905967. The reversal of 6478905965 is 5695098746.

It is a cyclic number.

It is not a de Polignac number, because 6478905965 - 2¹⁴ = 6478889581 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6478905967) 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 in 15 ways as a sum of consecutive naturals, for example, 950789 + ... + 957578.

It is an arithmetic number, because the mean of its divisors is an integer number (561060192).

Almost surely, 2^6478905965 is an apocalyptic number.

It is an amenable number.

6478905965 is a deficient number, since it is larger than the sum of its proper divisors (2498057107).

6478905965 is a wasteful number, since it uses less digits than its factorization.

6478905965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1908476.

The product of its (nonzero) digits is 16329600, while the sum is 59.

The square root of 6478905965 is about 80491.6515236208. The cubic root of 6478905965 is about 1864.2345772623.

The spelling of 6478905965 in words is "six billion, four hundred seventy-eight million, nine hundred five thousand, nine hundred sixty-five".