6440626204 has 24 divisors (see below), whose sum is σ = 11741713200. Its totient is φ = 3088513920.

The previous prime is 6440626187. The next prime is 6440626219. The reversal of 6440626204 is 4026260446.

It is a self number, because there is not a number n which added to its sum of digits gives 6440626204.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 323139 + ... + 342490.

It is an arithmetic number, because the mean of its divisors is an integer number (489238050).

Almost surely, 2^6440626204 is an apocalyptic number.

It is an amenable number.

6440626204 is a deficient number, since it is larger than the sum of its proper divisors (5301086996).

6440626204 is a wasteful number, since it uses less digits than its factorization.

6440626204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 665733 (or 665731 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 34.

The square root of 6440626204 is about 80253.5120976023. The cubic root of 6440626204 is about 1860.5557945161. Note that the first 3 decimals are identical.

The spelling of 6440626204 in words is "six billion, four hundred forty million, six hundred twenty-six thousand, two hundred four".