6378011855 has 8 divisors (see below), whose sum is σ = 7661701872. Its totient is φ = 5097017728.

The previous prime is 6378011797. The next prime is 6378011867. The reversal of 6378011855 is 5581108736.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6378011855 is a prime.

It is a Duffinian number.

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, 668762 + ... + 678231.

It is an arithmetic number, because the mean of its divisors is an integer number (957712734).

Almost surely, 2^6378011855 is an apocalyptic number.

6378011855 is a deficient number, since it is larger than the sum of its proper divisors (1283690017).

6378011855 is a wasteful number, since it uses less digits than its factorization.

6378011855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1347945.

The product of its (nonzero) digits is 201600, while the sum is 44.

The square root of 6378011855 is about 79862.4558537990. The cubic root of 6378011855 is about 1854.5068452668.

The spelling of 6378011855 in words is "six billion, three hundred seventy-eight million, eleven thousand, eight hundred fifty-five".