6568399090 has 24 divisors (see below), whose sum is σ = 12995661420. Its totient is φ = 2388508320.

The previous prime is 6568398997. The next prime is 6568399111. The reversal of 6568399090 is 909938656.

It can be written as a sum of positive squares in 2 ways, for example, as 6467537241 + 100861849 = 80421^2 + 10043^2 .

It is a Harshad number since it is a multiple of its sum of digits (55).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2713005 + ... + 2715424.

Almost surely, 2^6568399090 is an apocalyptic number.

6568399090 is a deficient number, since it is larger than the sum of its proper divisors (6427262330).

6568399090 is a wasteful number, since it uses less digits than its factorization.

6568399090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5428458 (or 5428447 counting only the distinct ones).

The product of its (nonzero) digits is 3149280, while the sum is 55.

The square root of 6568399090 is about 81045.6605254100. The cubic root of 6568399090 is about 1872.7789133332.

The spelling of 6568399090 in words is "six billion, five hundred sixty-eight million, three hundred ninety-nine thousand, ninety".