6444621150005 has 16 divisors (see below), whose sum is σ = 8188551915120. Its totient is φ = 4852366052352.

The previous prime is 6444621150001. The next prime is 6444621150031. The reversal of 6444621150005 is 5000511264446.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 545119375684 + 5899501774321 = 738322^2 + 2428889^2 .

It is a cyclic number.

It is not a de Polignac number, because 6444621150005 - 2² = 6444621150001 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6444621150001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8194487 + ... + 8946443.

It is an arithmetic number, because the mean of its divisors is an integer number (511784494695).

Almost surely, 2^{6444621150005} is an apocalyptic number.

It is an amenable number.

6444621150005 is a deficient number, since it is larger than the sum of its proper divisors (1743930765115).

6444621150005 is a wasteful number, since it uses less digits than its factorization.

6444621150005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 852808.

The product of its (nonzero) digits is 115200, while the sum is 38.

The spelling of 6444621150005 in words is "six trillion, four hundred forty-four billion, six hundred twenty-one million, one hundred fifty thousand, five".