6783646653 has 24 divisors (see below), whose sum is σ = 11280155328. Its totient is φ = 3848069952.

The previous prime is 6783646651. The next prime is 6783646673. The reversal of 6783646653 is 3566463876.

It is not a de Polignac number, because 6783646653 - 2¹ = 6783646651 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6783646653.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6783646651) 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 23 ways as a sum of consecutive naturals, for example, 384351 + ... + 401612.

It is an arithmetic number, because the mean of its divisors is an integer number (470006472).

Almost surely, 2^6783646653 is an apocalyptic number.

6783646653 is a gapful number since it is divisible by the number (63) formed by its first and last digit.

It is an amenable number.

6783646653 is a deficient number, since it is larger than the sum of its proper divisors (4496508675).

6783646653 is a wasteful number, since it uses less digits than its factorization.

6783646653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 786113 (or 786110 counting only the distinct ones).

The product of its digits is 13063680, while the sum is 54.

The square root of 6783646653 is about 82362.8960940544. The cubic root of 6783646653 is about 1893.0165291826.

The spelling of 6783646653 in words is "six billion, seven hundred eighty-three million, six hundred forty-six thousand, six hundred fifty-three".