444725420354021 has 16 divisors (see below), whose sum is σ = 453273587743536. Its totient is φ = 436183089278976.

The previous prime is 444725420354011. The next prime is 444725420354029. The reversal of 444725420354021 is 120453024527444.

It can be written as a sum of positive squares in 8 ways, for example, as 38686397185921 + 406039023168100 = 6219839^2 + 20150410^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-444725420354021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (444725420354029) 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, 3098779361 + ... + 3098922873.

It is an arithmetic number, because the mean of its divisors is an integer number (28329599233971).

Almost surely, 2^{444725420354021} is an apocalyptic number.

It is an amenable number.

444725420354021 is a deficient number, since it is larger than the sum of its proper divisors (8548167389515).

444725420354021 is a wasteful number, since it uses less digits than its factorization.

444725420354021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163432.

The product of its (nonzero) digits is 4300800, while the sum is 47.

The spelling of 444725420354021 in words is "four hundred forty-four trillion, seven hundred twenty-five billion, four hundred twenty million, three hundred fifty-four thousand, twenty-one".