444387074581 has 4 divisors (see below), whose sum is σ = 467775868000. Its totient is φ = 420998281164.

The previous prime is 444387074563. The next prime is 444387074587. The reversal of 444387074581 is 185470783444.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 444387074581 - 2⁹ = 444387074069 is a prime.

It is a super-2 number, since 2×444387074581² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (444387074587) by changing a digit.

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, 11694396681 + ... + 11694396718.

It is an arithmetic number, because the mean of its divisors is an integer number (116943967000).

Almost surely, 2^444387074581 is an apocalyptic number.

It is an amenable number.

444387074581 is a deficient number, since it is larger than the sum of its proper divisors (23388793419).

444387074581 is a wasteful number, since it uses less digits than its factorization.

444387074581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23388793418.

The product of its (nonzero) digits is 12042240, while the sum is 55.

The spelling of 444387074581 in words is "four hundred forty-four billion, three hundred eighty-seven million, seventy-four thousand, five hundred eighty-one".