6404840078 has 36 divisors (see below), whose sum is σ = 12101628960. Its totient is φ = 2533776336.

The previous prime is 6404840077. The next prime is 6404840089. The reversal of 6404840078 is 8700484046.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6404840077) by changing a digit.

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 in 17 ways as a sum of consecutive naturals, for example, 176798 + ... + 209921.

It is an arithmetic number, because the mean of its divisors is an integer number (336156360).

Almost surely, 2^6404840078 is an apocalyptic number.

6404840078 is a deficient number, since it is larger than the sum of its proper divisors (5696788882).

6404840078 is a wasteful number, since it uses less digits than its factorization.

6404840078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 386761 (or 386741 counting only the distinct ones).

The product of its (nonzero) digits is 172032, while the sum is 41.

The square root of 6404840078 is about 80030.2447703367. The cubic root of 6404840078 is about 1857.1034499257.

The spelling of 6404840078 in words is "six billion, four hundred four million, eight hundred forty thousand, seventy-eight".