6340643126 has 16 divisors (see below), whose sum is σ = 9609020928. Its totient is φ = 3137673000.

The previous prime is 6340643123. The next prime is 6340643137. The reversal of 6340643126 is 6213460436.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6340643123) 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 7 ways as a sum of consecutive naturals, for example, 377201 + ... + 393651.

It is an arithmetic number, because the mean of its divisors is an integer number (600563808).

Almost surely, 2^6340643126 is an apocalyptic number.

6340643126 is a deficient number, since it is larger than the sum of its proper divisors (3268377802).

6340643126 is a wasteful number, since it uses less digits than its factorization.

6340643126 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18427.

The product of its (nonzero) digits is 62208, while the sum is 35.

The square root of 6340643126 is about 79628.1553597721. The cubic root of 6340643126 is about 1850.8779009382.

The spelling of 6340643126 in words is "six billion, three hundred forty million, six hundred forty-three thousand, one hundred twenty-six".