6405819782 has 8 divisors (see below), whose sum is σ = 9626492352. Its totient is φ = 3196989000.

The previous prime is 6405819781. The next prime is 6405819799. The reversal of 6405819782 is 2879185046.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 6405819782.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6405819781) 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 3 ways as a sum of consecutive naturals, for example, 2959094 + ... + 2961257.

It is an arithmetic number, because the mean of its divisors is an integer number (1203311544).

Almost surely, 2^6405819782 is an apocalyptic number.

6405819782 is a deficient number, since it is larger than the sum of its proper divisors (3220672570).

6405819782 is a wasteful number, since it uses less digits than its factorization.

6405819782 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5920894.

The product of its (nonzero) digits is 967680, while the sum is 50.

The square root of 6405819782 is about 80036.3653722481. The cubic root of 6405819782 is about 1857.1981345130.

The spelling of 6405819782 in words is "six billion, four hundred five million, eight hundred nineteen thousand, seven hundred eighty-two".