441805388357818 has 4 divisors (see below), whose sum is σ = 662708082536730. Its totient is φ = 220902694178908.

The previous prime is 441805388357791. The next prime is 441805388357891. The reversal of 441805388357818 is 818753883508144.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 419313958802649 + 22491429555169 = 20477157^2 + 4742513^2 .

It is a super-2 number, since 2×441805388357818² (a number of 30 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110451347089453 + ... + 110451347089456.

Almost surely, 2^{441805388357818} is an apocalyptic number.

441805388357818 is a deficient number, since it is larger than the sum of its proper divisors (220902694178912).

441805388357818 is a wasteful number, since it uses less digits than its factorization.

441805388357818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220902694178911.

The product of its (nonzero) digits is 825753600, while the sum is 73.

The spelling of 441805388357818 in words is "four hundred forty-one trillion, eight hundred five billion, three hundred eighty-eight million, three hundred fifty-seven thousand, eight hundred eighteen".