6894641778 has 16 divisors (see below), whose sum is σ = 13791902400. Its totient is φ = 2297777456.

The previous prime is 6894641773. The next prime is 6894641783. The reversal of 6894641778 is 8771464986.

It is an interprime number because it is at equal distance from previous prime (6894641773) and next prime (6894641783).

It is not an unprimeable number, because it can be changed into a prime (6894641773) by changing a digit.

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, 74025 + ... + 138812.

It is an arithmetic number, because the mean of its divisors is an integer number (861993900).

Almost surely, 2^6894641778 is an apocalyptic number.

6894641778 is an abundant number, since it is smaller than the sum of its proper divisors (6897260622).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6894641778 is a wasteful number, since it uses less digits than its factorization.

6894641778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218241.

The product of its digits is 16257024, while the sum is 60.

The square root of 6894641778 is about 83033.9796589324. The cubic root of 6894641778 is about 1903.2853388612.

The spelling of 6894641778 in words is "six billion, eight hundred ninety-four million, six hundred forty-one thousand, seven hundred seventy-eight".