6393918873878 has 16 divisors (see below), whose sum is σ = 10155504638880. Its totient is φ = 3008767587456.

The previous prime is 6393918873847. The next prime is 6393918873893. The reversal of 6393918873878 is 8783788193936.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3463001 + ... + 4977972.

It is an arithmetic number, because the mean of its divisors is an integer number (634719039930).

Almost surely, 2^{6393918873878} is an apocalyptic number.

6393918873878 is a deficient number, since it is larger than the sum of its proper divisors (3761585765002).

6393918873878 is a wasteful number, since it uses less digits than its factorization.

6393918873878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8463271.

The product of its digits is 2633637888, while the sum is 80.

The spelling of 6393918873878 in words is "six trillion, three hundred ninety-three billion, nine hundred eighteen million, eight hundred seventy-three thousand, eight hundred seventy-eight".