444521612435321 has 4 divisors (see below), whose sum is σ = 444521654889600. Its totient is φ = 444521569981044.

The previous prime is 444521612435311. The next prime is 444521612435387. The reversal of 444521612435321 is 123534216125444.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-444521612435321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (444521612435311) 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, 6918020 + ... + 30608858.

It is an arithmetic number, because the mean of its divisors is an integer number (111130413722400).

Almost surely, 2^{444521612435321} is an apocalyptic number.

It is an amenable number.

444521612435321 is a deficient number, since it is larger than the sum of its proper divisors (42454279).

444521612435321 is a wasteful number, since it uses less digits than its factorization.

444521612435321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42454278.

The product of its digits is 2764800, while the sum is 47.

The spelling of 444521612435321 in words is "four hundred forty-four trillion, five hundred twenty-one billion, six hundred twelve million, four hundred thirty-five thousand, three hundred twenty-one".