6446478384 has 60 divisors (see below), whose sum is σ = 18990730200. Its totient is φ = 2035729152.

The previous prime is 6446478377. The next prime is 6446478461. The reversal of 6446478384 is 4838746446.

6446478384 is a `hidden beast` number, since 6 + 446 + 47 + 83 + 84 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 6446478384.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 1175349 + ... + 1180820.

It is an arithmetic number, because the mean of its divisors is an integer number (316512170).

Almost surely, 2^6446478384 is an apocalyptic number.

It is an amenable number.

6446478384 is an abundant number, since it is smaller than the sum of its proper divisors (12544251816).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6446478384 is a wasteful number, since it uses less digits than its factorization.

6446478384 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2356202 (or 2356193 counting only the distinct ones).

The product of its digits is 12386304, while the sum is 54.

The square root of 6446478384 is about 80289.9644040275. The cubic root of 6446478384 is about 1861.1191461166.

The spelling of 6446478384 in words is "six billion, four hundred forty-six million, four hundred seventy-eight thousand, three hundred eighty-four".