6642444642026 has 8 divisors (see below), whose sum is σ = 9963987215364. Its totient is φ = 3321115570240.

The previous prime is 6642444641983. The next prime is 6642444642109. The reversal of 6642444642026 is 6202464442466.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 6621620709001 + 20823933025 = 2573251^2 + 144305^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53297585 + ... + 53422068.

Almost surely, 2^{6642444642026} is an apocalyptic number.

6642444642026 is a deficient number, since it is larger than the sum of its proper divisors (3321542573338).

6642444642026 is a wasteful number, since it uses less digits than its factorization.

6642444642026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106750776.

The product of its (nonzero) digits is 10616832, while the sum is 50.

The spelling of 6642444642026 in words is "six trillion, six hundred forty-two billion, four hundred forty-four million, six hundred forty-two thousand, twenty-six".