6345984778 has 16 divisors (see below), whose sum is σ = 10918980864. Its totient is φ = 2709670320.

The previous prime is 6345984773. The next prime is 6345984779. The reversal of 6345984778 is 8774895436.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (6345984773) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 832525 + ... + 840112.

It is an arithmetic number, because the mean of its divisors is an integer number (682436304).

Almost surely, 2^6345984778 is an apocalyptic number.

6345984778 is a deficient number, since it is larger than the sum of its proper divisors (4572996086).

6345984778 is a wasteful number, since it uses less digits than its factorization.

6345984778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1672917.

The product of its digits is 40642560, while the sum is 61.

The square root of 6345984778 is about 79661.6895251413. The cubic root of 6345984778 is about 1851.3975101951.

The spelling of 6345984778 in words is "six billion, three hundred forty-five million, nine hundred eighty-four thousand, seven hundred seventy-eight".