404545442665 has 64 divisors (see below), whose sum is σ = 636876172800. Its totient is φ = 239383203840.

The previous prime is 404545442641. The next prime is 404545442677. The reversal of 404545442665 is 566244545404.

It is not a de Polignac number, because 404545442665 - 2¹³ = 404545434473 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

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 63 ways as a sum of consecutive naturals, for example, 977010 + ... + 1328020.

It is an arithmetic number, because the mean of its divisors is an integer number (9951190200).

Almost surely, 2^404545442665 is an apocalyptic number.

It is an amenable number.

404545442665 is a deficient number, since it is larger than the sum of its proper divisors (232330730135).

404545442665 is a wasteful number, since it uses less digits than its factorization.

404545442665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 351202.

The product of its (nonzero) digits is 9216000, while the sum is 49.

The spelling of 404545442665 in words is "four hundred four billion, five hundred forty-five million, four hundred forty-two thousand, six hundred sixty-five".