6445668801 has 16 divisors (see below), whose sum is σ = 10096712640. Its totient is φ = 3605968320.

The previous prime is 6445668799. The next prime is 6445668811. The reversal of 6445668801 is 1088665446.

It is not a de Polignac number, because 6445668801 - 2¹ = 6445668799 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6445668811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7512006 + ... + 7512863.

It is an arithmetic number, because the mean of its divisors is an integer number (631044540).

Almost surely, 2^6445668801 is an apocalyptic number.

It is an amenable number.

6445668801 is a deficient number, since it is larger than the sum of its proper divisors (3651043839).

6445668801 is a wasteful number, since it uses less digits than its factorization.

6445668801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15024896.

The product of its (nonzero) digits is 1105920, while the sum is 48.

The square root of 6445668801 is about 80284.9226256089. The cubic root of 6445668801 is about 1861.0412331120.

The spelling of 6445668801 in words is "six billion, four hundred forty-five million, six hundred sixty-eight thousand, eight hundred one".