6644230003261 has 2 divisors, whose sum is σ = 6644230003262. Its totient is φ = 6644230003260.

The previous prime is 6644230003253. The next prime is 6644230003291. The reversal of 6644230003261 is 1623000324466.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6558157592100 + 86072411161 = 2560890^2 + 293381^2 .

It is a cyclic number.

It is not a de Polignac number, because 6644230003261 - 2³ = 6644230003253 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6644230003261.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6644230003291) 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 as a sum of consecutive naturals, namely, 3322115001630 + 3322115001631.

It is an arithmetic number, because the mean of its divisors is an integer number (3322115001631).

Almost surely, 2^{6644230003261} is an apocalyptic number.

It is an amenable number.

6644230003261 is a deficient number, since it is larger than the sum of its proper divisors (1).

6644230003261 is an equidigital number, since it uses as much as digits as its factorization.

6644230003261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 124416, while the sum is 37.

The spelling of 6644230003261 in words is "six trillion, six hundred forty-four billion, two hundred thirty million, three thousand, two hundred sixty-one".