1004440644013 has 8 divisors (see below), whose sum is σ = 1029316349880. Its totient is φ = 979582897920.

The previous prime is 1004440643953. The next prime is 1004440644017. The reversal of 1004440644013 is 3104460444001.

It can be written as a sum of positive squares in 4 ways, for example, as 350732819529 + 653707824484 = 592227^2 + 808522^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 1004440644013 - 2⁹ = 1004440643501 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1004440644017) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4376670 + ... + 4600447.

It is an arithmetic number, because the mean of its divisors is an integer number (128664543735).

Almost surely, 2^{1004440644013} is an apocalyptic number.

It is an amenable number.

1004440644013 is a deficient number, since it is larger than the sum of its proper divisors (24875705867).

1004440644013 is an equidigital number, since it uses as much as digits as its factorization.

1004440644013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8979887.

The product of its (nonzero) digits is 18432, while the sum is 31.

The spelling of 1004440644013 in words is "one trillion, four billion, four hundred forty million, six hundred forty-four thousand, thirteen".