6478905964 has 12 divisors (see below), whose sum is σ = 11474689464. Its totient is φ = 3200423264.

The previous prime is 6478905947. The next prime is 6478905967. The reversal of 6478905964 is 4695098746.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 6478905899 and 6478905908.

It is not an unprimeable number, because it can be changed into a prime (6478905967) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9757057 + ... + 9757720.

It is an arithmetic number, because the mean of its divisors is an integer number (956224122).

Almost surely, 2^6478905964 is an apocalyptic number.

It is an amenable number.

6478905964 is a deficient number, since it is larger than the sum of its proper divisors (4995783500).

6478905964 is a wasteful number, since it uses less digits than its factorization.

6478905964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19514864 (or 19514862 counting only the distinct ones).

The product of its (nonzero) digits is 13063680, while the sum is 58.

The square root of 6478905964 is about 80491.6515174089. The cubic root of 6478905964 is about 1864.2345771664.

The spelling of 6478905964 in words is "six billion, four hundred seventy-eight million, nine hundred five thousand, nine hundred sixty-four".