6781381434 has 12 divisors (see below), whose sum is σ = 14692993146. Its totient is φ = 2260460472.

The previous prime is 6781381403. The next prime is 6781381469. The reversal of 6781381434 is 4341831876.

6781381434 is a `hidden beast` number, since 67 + 81 + 3 + 81 + 434 = 666.

It can be written as a sum of positive squares in only one way, i.e., 3583818225 + 3197563209 = 59865^2 + 56547^2 .

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 6781381434.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 188371689 + ... + 188371724.

Almost surely, 2^6781381434 is an apocalyptic number.

6781381434 is an abundant number, since it is smaller than the sum of its proper divisors (7911611712).

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

6781381434 is a wasteful number, since it uses less digits than its factorization.

6781381434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 376743421 (or 376743418 counting only the distinct ones).

The product of its digits is 387072, while the sum is 45.

The square root of 6781381434 is about 82349.1434928136. The cubic root of 6781381434 is about 1892.8057981596.

The spelling of 6781381434 in words is "six billion, seven hundred eighty-one million, three hundred eighty-one thousand, four hundred thirty-four".