444516646320021 has 24 divisors (see below), whose sum is σ = 666618339254560. Its totient is φ = 263138818108320.

The previous prime is 444516646320011. The next prime is 444516646320023. The reversal of 444516646320021 is 120023646615444.

It is not a de Polignac number, because 444516646320021 - 2⁵ = 444516646319989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (444516646320023) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14239097926 + ... + 14239129143.

Almost surely, 2^{444516646320021} is an apocalyptic number.

It is an amenable number.

444516646320021 is a deficient number, since it is larger than the sum of its proper divisors (222101692934539).

444516646320021 is a wasteful number, since it uses less digits than its factorization.

444516646320021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28478227137 (or 28478227126 counting only the distinct ones).

The product of its (nonzero) digits is 3317760, while the sum is 48.

The spelling of 444516646320021 in words is "four hundred forty-four trillion, five hundred sixteen billion, six hundred forty-six million, three hundred twenty thousand, twenty-one".