444664503478417 has 4 divisors (see below), whose sum is σ = 444682562411520. Its totient is φ = 444646444545316.

The previous prime is 444664503478369. The next prime is 444664503478451. The reversal of 444664503478417 is 714874305466444.

It is a happy number.

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 a de Polignac number, because none of the positive numbers 2^k-444664503478417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (444664503472417) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9029429617 + ... + 9029478862.

It is an arithmetic number, because the mean of its divisors is an integer number (111170640602880).

Almost surely, 2^{444664503478417} is an apocalyptic number.

It is an amenable number.

444664503478417 is a deficient number, since it is larger than the sum of its proper divisors (18058933103).

444664503478417 is a wasteful number, since it uses less digits than its factorization.

444664503478417 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18058933102.

The product of its (nonzero) digits is 867041280, while the sum is 67.

The spelling of 444664503478417 in words is "four hundred forty-four trillion, six hundred sixty-four billion, five hundred three million, four hundred seventy-eight thousand, four hundred seventeen".