6406627408 has 30 divisors (see below), whose sum is σ = 12499730286. Its totient is φ = 3180917376.

The previous prime is 6406627397. The next prime is 6406627417. The reversal of 6406627408 is 8047266046.

It can be written as a sum of positive squares in 3 ways, for example, as 7907344 + 6398720064 = 2812^2 + 79992^2 .

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 5 ways as a sum of consecutive naturals, for example, 4010866 + ... + 4012462.

Almost surely, 2^6406627408 is an apocalyptic number.

It is an amenable number.

6406627408 is a deficient number, since it is larger than the sum of its proper divisors (6093102878).

6406627408 is an equidigital number, since it uses as much as digits as its factorization.

6406627408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3359 (or 1756 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 43.

The square root of 6406627408 is about 80041.4105822730. The cubic root of 6406627408 is about 1857.2761811706.

The spelling of 6406627408 in words is "six billion, four hundred six million, six hundred twenty-seven thousand, four hundred eight".