6478634840 has 32 divisors (see below), whose sum is σ = 14628828960. Its totient is φ = 2582227200.

The previous prime is 6478634819. The next prime is 6478634857. The reversal of 6478634840 is 484368746.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 276956 + ... + 299435.

It is an arithmetic number, because the mean of its divisors is an integer number (457150905).

Almost surely, 2^6478634840 is an apocalyptic number.

It is an amenable number.

6478634840 is an abundant number, since it is smaller than the sum of its proper divisors (8150194120).

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

6478634840 is a wasteful number, since it uses less digits than its factorization.

6478634840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 576683 (or 576679 counting only the distinct ones).

The product of its (nonzero) digits is 3096576, while the sum is 50.

The square root of 6478634840 is about 80489.9673251269. The cubic root of 6478634840 is about 1864.2085724783.

The spelling of 6478634840 in words is "six billion, four hundred seventy-eight million, six hundred thirty-four thousand, eight hundred forty".