4118644021805 has 16 divisors (see below), whose sum is σ = 4978177598784. Its totient is φ = 3271089951360.

The previous prime is 4118644021777. The next prime is 4118644021819. The reversal of 4118644021805 is 5081204468114.

It is not a de Polignac number, because 4118644021805 - 2²² = 4118639827501 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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, 2046656 + ... + 3525065.

It is an arithmetic number, because the mean of its divisors is an integer number (311136099924).

Almost surely, 2^{4118644021805} is an apocalyptic number.

It is an amenable number.

4118644021805 is a deficient number, since it is larger than the sum of its proper divisors (859533576979).

4118644021805 is a wasteful number, since it uses less digits than its factorization.

4118644021805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5572796.

The product of its (nonzero) digits is 245760, while the sum is 44.

Adding to 4118644021805 its reverse (5081204468114), we get a palindrome (9199848489919).

The spelling of 4118644021805 in words is "four trillion, one hundred eighteen billion, six hundred forty-four million, twenty-one thousand, eight hundred five".