43644985808413 has 32 divisors (see below), whose sum is σ = 48638271209472. Its totient is φ = 39155912112240.

The previous prime is 43644985808377. The next prime is 43644985808441. The reversal of 43644985808413 is 31480858944634.

43644985808413 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 43644985808413 - 2⁹ = 43644985807901 is a prime.

It is a super-2 number, since 2×43644985808413² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43644985808113) 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 31 ways as a sum of consecutive naturals, for example, 99981220 + ... + 100416802.

It is an arithmetic number, because the mean of its divisors is an integer number (1519945975296).

Almost surely, 2^{43644985808413} is an apocalyptic number.

It is an amenable number.

43644985808413 is a deficient number, since it is larger than the sum of its proper divisors (4993285401059).

43644985808413 is an equidigital number, since it uses as much as digits as its factorization.

43644985808413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 436606 (or 436584 counting only the distinct ones).

The product of its (nonzero) digits is 318504960, while the sum is 67.

The spelling of 43644985808413 in words is "forty-three trillion, six hundred forty-four billion, nine hundred eighty-five million, eight hundred eight thousand, four hundred thirteen".