8294778646 has 16 divisors (see below), whose sum is σ = 15512313600. Its totient is φ = 3231731880.

The previous prime is 8294778641. The next prime is 8294778649. The reversal of 8294778646 is 6468774928.

It is a super-2 number, since 2×8294778646² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8294778641) 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 7 ways as a sum of consecutive naturals, for example, 26930946 + ... + 26931253.

It is an arithmetic number, because the mean of its divisors is an integer number (969519600).

Almost surely, 2^8294778646 is an apocalyptic number.

8294778646 is a deficient number, since it is larger than the sum of its proper divisors (7217534954).

8294778646 is a wasteful number, since it uses less digits than its factorization.

8294778646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53862219.

The product of its digits is 32514048, while the sum is 61.

The square root of 8294778646 is about 91075.6753804220. The cubic root of 8294778646 is about 2024.2691989566.

The spelling of 8294778646 in words is "eight billion, two hundred ninety-four million, seven hundred seventy-eight thousand, six hundred forty-six".