444515433454018 has 16 divisors (see below), whose sum is σ = 671582196684000. Its totient is φ = 220654758928032.

The previous prime is 444515433454013. The next prime is 444515433454019. The reversal of 444515433454018 is 810454334515444.

It is a self number, because there is not a number n which added to its sum of digits gives 444515433454018.

It is not an unprimeable number, because it can be changed into a prime (444515433454013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1039393 + ... + 29834731.

It is an arithmetic number, because the mean of its divisors is an integer number (41973887292750).

Almost surely, 2^{444515433454018} is an apocalyptic number.

444515433454018 is a deficient number, since it is larger than the sum of its proper divisors (227066763229982).

444515433454018 is a wasteful number, since it uses less digits than its factorization.

444515433454018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28851009.

The product of its (nonzero) digits is 36864000, while the sum is 55.

The spelling of 444515433454018 in words is "four hundred forty-four trillion, five hundred fifteen billion, four hundred thirty-three million, four hundred fifty-four thousand, eighteen".