6807012640 has 24 divisors (see below), whose sum is σ = 16081567740. Its totient is φ = 2722804992.

The previous prime is 6807012571. The next prime is 6807012649. The reversal of 6807012640 is 462107086.

It can be written as a sum of positive squares in 2 ways, for example, as 6513781264 + 293231376 = 80708^2 + 17124^2 .

It is a super-2 number, since 2×6807012640² = 92670842162239539200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 6807012596 and 6807012605.

It is not an unprimeable number, because it can be changed into a prime (6807012649) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21271755 + ... + 21272074.

Almost surely, 2^6807012640 is an apocalyptic number.

It is an amenable number.

6807012640 is an abundant number, since it is smaller than the sum of its proper divisors (9274555100).

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

6807012640 is a wasteful number, since it uses less digits than its factorization.

6807012640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42543844 (or 42543836 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 6807012640 is about 82504.6219311379. The cubic root of 6807012640 is about 1895.1875105397.

The spelling of 6807012640 in words is "six billion, eight hundred seven million, twelve thousand, six hundred forty".