444681463522021 has 16 divisors (see below), whose sum is σ = 486483945480000. Its totient is φ = 403109813088000.

The previous prime is 444681463521983. The next prime is 444681463522027. The reversal of 444681463522021 is 120225364186444.

It is a cyclic number.

It is not a de Polignac number, because 444681463522021 - 2⁹ = 444681463521509 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 444681463522021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (444681463522027) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27135106 + ... + 40319683.

It is an arithmetic number, because the mean of its divisors is an integer number (30405246592500).

Almost surely, 2^{444681463522021} is an apocalyptic number.

It is an amenable number.

444681463522021 is a deficient number, since it is larger than the sum of its proper divisors (41802481957979).

444681463522021 is a wasteful number, since it uses less digits than its factorization.

444681463522021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67456500.

The product of its (nonzero) digits is 8847360, while the sum is 52.

The spelling of 444681463522021 in words is "four hundred forty-four trillion, six hundred eighty-one billion, four hundred sixty-three million, five hundred twenty-two thousand, twenty-one".