6418778147 has 4 divisors (see below), whose sum is σ = 6423258840. Its totient is φ = 6414297456.

The previous prime is 6418778143. The next prime is 6418778221. The reversal of 6418778147 is 7418778146.

6418778147 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 6418778147 - 2² = 6418778143 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6418778143) 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 3 ways as a sum of consecutive naturals, for example, 2238197 + ... + 2241062.

It is an arithmetic number, because the mean of its divisors is an integer number (1605814710).

Almost surely, 2^6418778147 is an apocalyptic number.

6418778147 is a deficient number, since it is larger than the sum of its proper divisors (4480693).

6418778147 is a wasteful number, since it uses less digits than its factorization.

6418778147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4480692.

The product of its digits is 2107392, while the sum is 53.

The square root of 6418778147 is about 80117.2774562391. The cubic root of 6418778147 is about 1858.4496028352.

Subtracting 6418778147 from its reverse (7418778146), we obtain a palindrome (999999999).

The spelling of 6418778147 in words is "six billion, four hundred eighteen million, seven hundred seventy-eight thousand, one hundred forty-seven".