6783612381 has 120 divisors (see below), whose sum is σ = 12875816184. Its totient is φ = 3527193600.

The previous prime is 6783612377. The next prime is 6783612397. The reversal of 6783612381 is 1832163876.

6783612381 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 3572100 + 6780040281 = 1890^2 + 82341^2 .

It is not a de Polignac number, because 6783612381 - 2² = 6783612377 is a prime.

It is a super-2 number, since 2×6783612381² = 92034793871312978322, which contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6783612281) 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 119 ways as a sum of consecutive naturals, for example, 3765681 + ... + 3767481.

Almost surely, 2^6783612381 is an apocalyptic number.

It is an amenable number.

6783612381 is a deficient number, since it is larger than the sum of its proper divisors (6092203803).

6783612381 is a wasteful number, since it uses less digits than its factorization.

6783612381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1913 (or 1897 counting only the distinct ones).

The product of its digits is 290304, while the sum is 45.

The square root of 6783612381 is about 82362.6880389415. The cubic root of 6783612381 is about 1893.0133412428.

The spelling of 6783612381 in words is "six billion, seven hundred eighty-three million, six hundred twelve thousand, three hundred eighty-one".