6840582478 has 4 divisors (see below), whose sum is σ = 10260873720. Its totient is φ = 3420291238.

The previous prime is 6840582449. The next prime is 6840582547. The reversal of 6840582478 is 8742850486.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1710145618 + ... + 1710145621.

It is an arithmetic number, because the mean of its divisors is an integer number (2565218430).

Almost surely, 2^6840582478 is an apocalyptic number.

6840582478 is a deficient number, since it is larger than the sum of its proper divisors (3420291242).

6840582478 is a wasteful number, since it uses less digits than its factorization.

6840582478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3420291241.

The product of its (nonzero) digits is 3440640, while the sum is 52.

The square root of 6840582478 is about 82707.8138872017. The cubic root of 6840582478 is about 1898.2978733787.

The spelling of 6840582478 in words is "six billion, eight hundred forty million, five hundred eighty-two thousand, four hundred seventy-eight".